January

Is Protein Best Before or After a Meal?

1/04/2019
A new study showed that the timing of protein supplementation around a meal can determine the effect on blood sugar in people with insulin resistance. Find out the best timing in the update to the Protein Powders, Drinks, and Shakes Review. (Also see our Top Picks among products.)

Is Taking Vinegar Helpful?

1/07/2019
Two studies compared the effectiveness of vinegar pills to liquid vinegar in controlling blood sugar after a meal. See the results in the "Blood sugar control" section of the Apple Cider Vinegar Review. (Also see our Top Picks for apple cider vinegar.)

B Vitamins & Breast Cancer

1/07/2019
A reduced risk of breast cancer was associated with supplementing with certain amounts of folic acid and vitamin B12 for women predisposed to breast cancer in a new study. See the details in the "Breast cancer" section of the B Vitamin Supplements Review.

Maintaining Muscle With Fish Oil?

1/11/2019
Can taking fish oil prevent muscle loss when a limb is immobilized, such as in a brace? Find out what a recent study showed in the "Strength and Muscle" section of the Fish Oil Supplements Review. (Also see our Top Picks for fish oil.)

Fiber Benefits

1/11/2019
Higher fiber intake was associated with a lower risk of many major diseases in a recent study. However, the average American consumes far below the recommended daily intake of fiber. As oats are a good source of fiber, we’ve added details from the new study in the "Benefits" section of the Oat Cereals Review. (Also see our Top Picks oat cereals.)

Pea vs. Whey Protein

1/14/2019
Which is better for increasing strength and muscle thickness, pea protein or whey protein? See what a recent study showed in the Protein Powders Review. Also see our Top Pick for each type of protein.

Don't Take Minerals With Certain Supplements

1/14/2019
Taking minerals like calcium and magnesium can dramatically reduce the absorption of carotenoids like lycopene, beta carotene, and astaxanthin. Get the details in the Concerns and Cautions section of the Lycopene Supplements Review.

Anxiety Treatment -- Low-Dose CBD?

1/14/2019
Does low-dose CBD (cannabidiol) help with anxiety and sleep disorders? See the results of a recently published case series in the What It Does section of the CBD & Hemp Extract Supplements Review. Also see our Top Pick for CBD.

B12 Tablet vs. Injection

1/14/2019
Is a vitamin B12 tablet just as good as an injection for raising blood levels of B12? Find out in the Cobalamin (B12) section of the B Vitamin Supplements Review. Also see our Top Pick for vitamin B12.

Is Omega-6 a Problem?

1/18/2019
Do omega-6 fatty acids like LA and GLA, found in many seed oils, promote inflammation in the body? No, and yes, according to the latest findings. Get the details in the Is Omega-6 a Problem? section of our Omega-3 and -6 Fatty Acid Supplements Review.

Dog Overdoses on Supplement

1/18/2019
Be sure to keep your supplements away from pets -- especially if they taste sweet. A dog overdosed on its owner's fast-dissolving tablets, putting it in a coma, according to a recent report. For details, see the Concerns and Cautions section of the L-tryptophan and 5-HTP Supplements Review.

Garlic and Blood Pressure

1/22/2019
If you have high blood pressure, a particular garlic supplement may provide some benefit, according to a recent study. For details, see the "What It Does" section of the Garlic Supplements Review. Also see our top choices for garlic supplements.

Fish Oil for Asthma?

1/25/2019
Can high-dose fish oil help people with asthma? See what a study recently found in the "What It Does" section of the Fish Oil Supplements Review. Also see our Top Picks for fish oil.

Caution With Antioxidants

1/26/2019
A new study suggests it might be risky to take antioxidant supplements during cancer treatment. We have added this important information to our answer to the following question: Can supplements with antioxidants like beta-carotene and vitamins A and E cause you to die sooner?

Getting the Most from Green Tea

1/29/2019
If you drink green tea to get beneficial compounds like EGCG, learn about a recent study that suggests that the type of water you use to brew tea drastically affects the amount of EGCG you get. Get the details in the How to Take section of the Green Tea Review. Also see our Top Picks for green tea.

February

Does Vitamin D Reduce Risk of Falls?

2/01/2019
Vitamin D can reduce the risk of falls when given to people deficient in vitamin D. But what happens when you give high-dose vitamin D to people who are not deficient? Find out in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D supplements.

Whey Protein When Bedridden?

2/01/2019
Does substituting whey protein for other sources of protein help bedridden people retain muscle mass and strength? Find out what a new study showed in the What It Does section of the Protein Powders & Drinks Review. Also see our Top Picks for protein powders.

A Probiotic for Migraine

2/01/2019
Use of a particular probiotic for several weeks was found to modestly reduce the frequency and severity of migraine headaches. Get the details in the What It Does section of the Probiotic Supplements Review.

Theanine for Anxiety?

2/04/2019
Theanine is promoted as an anxiety-reducing supplement, but does it really work? See results of a recent study in the What It Does section of the L-theanine Supplements Review. Also see our top choices for L-theanine supplements.

Caution with Ginger

2/05/2019
Some evidence suggests that ginger may help alleviate nausea during chemotherapy, but it was recently shown that it can interact with some chemotherapeutic drugs, which can be dangerous. See the Concerns and Cautions section of the Ginger Supplements & Ales Review.

Vitamin C for Blood Sugar Control

2/11/2019
High-dose vitamin C was found to help control blood sugar levels in people with type 2 diabetes in a recent study. For details, see the What It Does section of the Vitamin C Supplements Review. Also see our latest Top Picks for vitamin C.

Plastic Bottles Okay for Olive Oil?

2/11/2019
A recent study compared the effects of storing extra virgin olive oil in plastic versus glass bottles, as well as the effects of light. Find out which bottle and setting fared best in the ConsumerTips section of the Extra Virgin Olive Oils Review. Also see our latest Top Picks for extra virgin olive oil.

Energy Drinks & Aggression

2/15/2019
Are people who frequently consume energy drinks (like 5-hour Energy) more likely to be aggressive or have mental health problems? Learn what a new study found, and learn more about the pros and cons of energy drinks in the Energy Drinks section of the B Vitamin Supplements Review.

Right Amount of D for Cognition

2/18/2019
Three different doses of vitamin D were given to older women in a one-year study of cognition. Find out which dose resulted in the best performance on cognitive tests in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Kidney Stones Due to Supplement?

2/18/2019
An unusual type of kidney stone has been reported in several people who regularly consumed large amounts of a vitamin and amino acid supplement containing a particular form of choline and vitamin C. For details, see the Concerns and Cautions section of the Choline Supplements Review.

Allergic Reactions to Protein Powder

2/22/2019
Be aware that allergic reactions to protein powders have recently been reported in people not normally allergic the protein sources of their supplements. For details, see the Concerns and Cautions section of the Protein Powders, Shakes, and Drinks Review. Also see our Top Picks for protein supplements.

Does CBD Cream Help?

2/25/2019
Does CBD cream decrease muscle soreness following exercise? Does CBD gel help with knee pain from osteoarthritis? Learn what recent studies have found in the What It Does section of the CBD and Hemp Extract Review. Also see our Top Picks for CBD oils and topical products.

Many Men and Women Not Getting Enough Protein

2/26/2019
A national study found that many older men and women don't get enough protein in their diets, including those in their 50s. For details, see the What It Does section of the Protein Powders and Drinks Review. Also see our Top Picks among protein supplements.

March

Soy Isoflavones & Breast Cancer Risk

3/05/2019
Soy isoflavones, which have estrogen-like effects, are used by women hoping to reduce menopausal symptoms. A new study suggests this use may raise the risk of breast cancer in some women but lower it in others. For details, see the What It Does section of the Soy Isoflavone Supplements Review.

CBD & Cancer

3/07/2019
Preliminary evidence suggests that CBD (cannabidiol) may have anti-cancer properties, and a dramatic reduction in tumor size was recently reported in a person taking low-dose CBD. For details, see the What It Does section of the CBD Oils and Hemp Extracts Review.

Boswellia for Osteoarthritis

3/08/2019
Boswellia extract may reduce the pain and stiffness of knee osteoarthritis. See results of a recent study in the What It Does section of the Joint Health Supplements Review. Also see our Top Picks for Boswellia and other joint health supplements.

Ashwagandha for Vitality?

3/11/2019
Did giving ashwagandha to middle-aged, overweight men improve their vitality, vigor, or levels of testosterone? Find out in the What It Does section of the Ashwagandha Supplements Review. Also see our Top Pick for ashwagandha.

Bioengineered Salmon Approved

3/11/2019
As of this month, genetically engineered salmon can be legally sold in the U.S. Learn how it compares to other salmon in terms of EPA and DHA in the Farmed vs. Wild Salmon section of our Fish Oil Review. (Also see the results of our tests of canned fish in the separate Canned Tuna and Canned Salmon Review.)

Vitamin D for Overactive Bladder?

3/15/2019
Vitamin D supplementation may help vitamin D-deficient people who suffer from urinary urgency or frequency. Get the details in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D supplements.

Colloidal Silver Concern

3/15/2019
Long-term use of colloidal silver may have contributed to the development of bone marrow cancer, according to a new report. We’ve added details about this to our answer to the question: Is ingesting colloidal silver helpful for any condition and is it safe to use?

Melatonin for Troubled Sleep?

3/18/2019
Does melatonin supplementation help people with a condition involving intense dreams as well as laughing, yelling, kicking or punching during sleep? Learn what a recent study found in the What It Does section of the Melatonin Supplements Review. Also see our Top Picks for melatonin.

Prescription Fish Oil Lowers Heart Attack Risk

3/18/2019
A prescription fish oil was found to lower the risk of cardiovascular events such as heart attack and stroke by 30% in people at high risk. For details, see the Prescription Fish Oil vs. Supplements section of the Fish Oil Supplements Review. Also see our Top Picks for fish oil supplements.

Hot Tea & Cancer

3/19/2019
Drinking very hot tea increases the risk of developing esophageal cancer. How long should you wait after brewing to drink tea? Find out what recent studies are showing in the What It Does section of the Green Tea Review. Also see other tips for the best way to prepare brewable green tea, and our Top Picks among green tea products.

New Potassium Recommendations

3/21/2019
The amount of potassium needed to achieve nutritional adequacy was officially reduced this month for all ages. Find out why and get the new recommendations in the What to Consider When Using section of the Potassium Supplements Review. Also see our Top Picks for potassium supplements.

Calcium Supplements and Macular Degeneration

3/22/2019
Two large studies have sought to determine if there is an association between calcium supplementation and the risk of developing age-related macular degeneration (AMD). See what they found in the What It Does section of the Calcium Supplements Review. Also see our Top Picks among calcium supplements.

Red Yeast Rice & Liver Injury

3/25/2019
Hepatitis was recently reported in a woman in the U.S. who was taking a red yeast rice supplement. Other cases have been reported. For details, see the Concerns and Cautions section of the Red Yeast Rice Supplements Review. Also see our Top Pick among products.

Vitamin C Blunts Exercise Benefits

3/25/2019
If you are trying to build muscle with resistance exercise, go easy on vitamins C and E, according to a recent study. Get the details in the Concerns and Cautions section of the Vitamin C Supplements Review.

Curcumin Caution: May Lower Iron

3/26/2019
If you’re low in iron, be careful with high doses of curcumin (turmeric extract). See the Concerns and Cautions section of the Curcumin and Turmeric Review. Also see our Top Picks among products.

Green Tea for Lowering Blood Pressure

3/29/2019
Drinking green tea can help lower high blood pressure – and even reverse ventricular hypertrophy, according to a new study. For details, including the amount and brand of tea used, see the What It Does section of the Green Tea Review. Also see our Top Picks for green tea.

Apple Cider Vinegar & Diabetes

3/29/2019
Can apple cider vinegar help control blood sugar in people with type 2 diabetes? See what a recent study found in the What It Does section of the Apple Cider Vinegar Review. Also see our Top Picks for apple cider vinegar.

Curcumin Interactions

3/29/2019
Curcumin (from turmeric) can interact with a variety of medications, requiring discontinuation of curcumin or adjustment in medication dosage. The most recently reported interaction is with tamoxifen. For details, see the Concerns and Cautions section of the Turmeric and Curcumin Supplements and Spices Review. Also see our Top Picks among products.

April

Green Tea and Breast Cancer

4/01/2019
Drinking green tea has been associated with a reduced risk of breast cancer recurrence. But what effect does high-dose green tea extract have? See what a major study found in the What It Does section of the Green Tea Review. Also see our Top Picks among green tea products.

Vitamin D for Depression?

4/05/2019
Can supplementation with vitamin D help people diagnosed with depression? Learn what the latest studies are showing in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D supplements.

Vitamin D & Kidney Failure

4/08/2019
Although rare, excess intake of vitamin D can lead to kidney failure. This recently happened to a man taking a higher dose of vitamin D than he thought. Learn more in the Concerns and Cautions section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D supplements.

Lunasin to Lower Cholesterol?

4/08/2019
Can taking lunasin, a protein isolated from soy, help to lower LDL cholesterol and triglyceride levels? See what a new study found in our updated answer to the question: What is lunasin and does it really reduce cholesterol?

Powerful Combination for Alzheimer's

4/08/2019
Fish oil can help people with Alzheimer's disease but, as a new study suggests, only when they are getting enough of another nutrient. Get the details in the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks among products.

Food vs. Supplements for Getting Vitamins & Minerals

4/11/2019
We've added new information to our answer to the question Is it better to get vitamins from foods or supplements, and are natural vitamins better than synthetic vitamins? The new information is based on an investigation of the association between nutrient intakes and the risk of dying from cancer and/or other causes.

Maca for Improved Functioning?

4/12/2019
Do maca supplements improve functioning and lessen fatigue? A recent study found different results for men and women. Get the details in the What It Does section of the Maca Supplements Review. Also see our top choices among maca products.

Does Vitamin D Improve Cancer Survival?

4/12/2019
Does giving high-dose vitamin D to people with cancer of the colon or other parts of the digestive tract improve survival rates? Find out what recent studies are showing in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D supplements.

Creatine for Older People

4/15/2019
Creatine may boost the benefits of resistance exercise for older people, according to recent studies. For details, including dosage, see the What It Does section of the Creatine Supplements Review. Also see our Top Picks for creatine.

Problems With Green Coffee Bean

4/15/2019
A recently published analysis found that many green coffee bean extract supplements provided much lower amounts of key compounds than listed – a finding consistent with ConsumerLab's own Review. For details, see the ConsumerTips section of the Green Coffee Bean Extract Supplements Review.

Ginseng Interaction?

4/15/2019
Liver injury was recently reported in a man who began taking a Siberian ginseng supplement in addition to his prescription statin medication. Get the details in the Concerns and Cautions section of the Ginseng Supplements Review.

CBD for Post-traumatic Stress Disorder (PTSD)?

4/18/2019
Can moderate doses of CBD help people with post-traumatic stress disorder? See the latest clinical findings in the What It Does section of the CBD Oil and Hemp Extract Supplements Review. Also see our Top Picks for formulations of CBD.

Curcumin for Asthma?

4/19/2019
Find out if curcumin (from turmeric powder) decreased asthma symptoms in a recent study, as described in the What It Does section of the Curcumin and Turmeric Supplements & Spices Review. Also see our Top Picks for curcumin and turmeric supplements.

Fish Oil During Pregnancy

4/22/2019
Does taking fish oil during pregnancy yield children with higher IQs? Find out what studies are showing in the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks for fish oil supplements and other sources of omega-3 fatty acids.

Probiotic for Diverticulitis

4/26/2019
Giving a specific probiotic to people hospitalized for acute diverticulitis was found to reduce pain, inflammation, and the duration of their hospital stays. Get the details in the What It Does section of the Probiotic Supplements Review. Also see our Top Picks for probiotics.

Vitamin D & Incontinence

4/26/2019
Does giving high-dose vitamin D help women who have urinary incontinence? See what a recent study found in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

No Ginseng In Ginseng Tea?

4/26/2019
A popular maker of bottled teas is being sued for allegedly not putting ginseng in its ginseng green tea. For details, see the Quality Concerns section of the Ginseng Supplements Review. Also see which ginseng products were Approved by ConsumerLab (and see our tests of various Green Teas).

Saffron for Vision

4/29/2019
Saffron, which contains carotenoids, may improve visual acuity in people with age-related macular degeneration (AMD) according to a recent study. For details, see the ConsumerTips section of the Vision Supplements Review. Also see which vision supplements most closely resemble the ideal formula to slow the progression of AMD.

May

Probiotic for Anxiety?

5/03/2019
A number of studies have evaluated probiotics for reducing anxiety, stress, and depression. See the results of the latest study in the What It Does section of the Probiotic Supplements Review. Also see our Top Picks among probiotics.

Statins Plus Fish Oil?

5/06/2019
Does high-dose fish oil provide additional coronary benefit to people already taking a statin drug? Find out in the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks among fish oils.

Vitamin D for Vertigo?

5/06/2019
Vitamin D may be beneficial in preventing recurrence of a common form of vertigo known as benign paroxysmal positional vertigo (or BPPV) according to a preliminary study. For details, see the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Best Oats for Controlling Blood Sugar?

5/10/2019
A recent study compared the effects on blood sugar and insulin levels of steel-cut oats, old fashioned rolled oats, instant ("quick") oats, and honey nut oat cereal. The surprising results are found in the Oat Cereals Review. Also see our Top Pick for oat cereals.

MCT Oil for Cognition?

5/10/2019
It has been speculated that people with certain forms of cognitive impairment may benefit from consuming medium chain triglycerides (MCT oils). See what a recent clinical trial found in the What It Does section of the Coconut and MCT Oils Review. Also see our Top Picks among products.

Gummies vs. Tablets for Vitamin D

5/10/2019
Are gummy supplements better than tablets for getting vitamin D? See the results in the What to Consider When Buying section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

How Do "Overnight Oats" Affect Blood Sugar?

5/14/2019
We recently reported on the effects of various types of oats on blood sugar. A study by the same researchers has evaluated overnight oats – rolled oats soaked overnight in milk. Find out how overnight oats compare, see the Oat Cereals Review. Also see our Top Picks among oat cereals.

Vitamin D and Sunscreen

5/14/2019
Is it possible to protect your skin from sunburn but still produce vitamin D? See what a recent study found in the Getting vitamin D from sunlight section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Glucosamine and Heart Disease

5/14/2019
Does taking glucosamine affect your risk of developing cardiovascular disease? See what a large study recently found in the What It Does section of the Joint Health Supplements Review (Glucosamine, Chondroitin, MSM and Boswellia). Also see our Top Picks among joint health supplements.

Hip Fracture Risk with B6

5/17/2019
Another study has shown a significantly increased risk of hip fracture with high intakes of vitamin B6 from supplements. For details, see the B-6 section of the B Vitamins Review. Also see how much B6 is in popular B vitamin supplements and our Top Picks.

Misdiagnosed B12 Deficiency

5/17/2019
Vitamin B12 is needed to make the genetic material in all cells. Consequently, B12 deficiency can cause a wide range of symptoms and may be misdiagnosed as other diseases. Read about two recent cases of misdiagnosed B12 deficiency in the Cobalamin (B12) section of the B Vitamin Supplements Review. Also see our Top Picks for B12.

Phytoceramides for Aging Skin?

5/17/2019
Can phytoceramide supplements reduce wrinkles and improve the appearance of aging skin? See what a recent study found in our updated answer to the question: What are phytoceramides? Do phytoceramide supplements really work to improve aging skin?

Vitamin D-Autism Study Retracted

5/19/2019
A study that showed a benefit in giving high-dose vitamin D to children with autism spectrum disorder has been retracted due to a lack of confidence in the findings by the editors of the journal in which it appeared. For details, see the What It Does section of the Vitamin D Supplements Review.

Does Tart Cherry Juice Help?

5/21/2019
A recent clinical trial investigated the effects of Montmorency tart cherry juice on blood sugar control, markers of inflammation, and the gut. Find out if it helped. See our updated answer to the question: What are the benefits of tart cherry juice?

Liver Injury With Ashwagandha

5/21/2019
Although rare, several cases of liver injury associated with the use of ashwagandha supplements were recently reported. See the details in the Concerns and Cautions section of the Ashwagandha Supplements Review. This has affected our selection of a Top Pick.

Reducing Drug Craving

5/21/2019
High-dose CBD may help reduce drug cravings in people with heroin use disorder according to a recent study. For details, see the What It Does section of the CBD Oils and Hemp Extracts Review. Also see our Top Picks among products.

Concern With a Colorant

5/24/2019
Titanium dioxide is a common white colorant in foods and supplements. A recent study in mice, however, suggests that it may affect the gut. For details, see the updated Titanium Dioxide section of the Inactive Ingredients/Excipients article.

Vitamin B12 & Depression

5/27/2019
Deficiencies in B vitamins, such as B12, can cause depression. A recent study suggests that, in pregnant women, even low-normal B12 levels are associated with a much higher risk of depression. For details, see the Depression section of the B Vitamin Supplements Review. Also see our Top Picks for B vitamins.

Glucosamine & Eye Pressure

5/27/2019
Glucosamine may increase eye pressure in people with glaucoma or intraocular hypertension. But does it have this effect in people who don't have these conditions? See what a new study found in the Concerns and Cautions section of the Joint Health Supplements Review. Also see our Top Picks for glucosamine and chondroitin.

Licorice Tea Caution

5/30/2019
Be careful with licorice tea because it can cause serious side effects, as recently happened to a man who drank one to two cups daily. Get more details in our answer about licorice tea.

Be Careful with Yohimbe

5/31/2019
Yohimbe is a common ingredient in certain supplements for men but can be dangerous, as evidenced by recent report. Get the details in the Concerns and Cautions section of the Review.

June

Vitamin D for Psoriasis?

6/01/2019
A recent study evaluated the effects of giving high-dose vitamin D to people with plaque psoriasis. See the results in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Dangerous Compound Found in CBD Oil

6/03/2019
A "CBD oil" was found to contain a dangerous, synthetic cannabinoid. For details, see the Concerns and Cautions section of the CBD Oils and Hemp Extracts Review. Also see our Top Picks among products.

Turmeric (Curcumin) and Fatty Liver Disease

6/07/2019
Several studies suggest that curcumin supplements (from turmeric) may be helpful to people with non-alcoholic fatty liver disease. For details, see the What It Does section of the Turmeric & Curcumin Supplements Review. Also see our Top Picks among products.

Liver Injury With Turmeric

6/07/2019
Another case of liver injury from a turmeric/curcumin supplement was recently reported. Although not common, it is important to be aware of this potential risk. For details, see the Concerns and Cautions section of the Turmeric & Curcumin Supplements Review.

Avoiding Microplastics in Bottled Water

6/07/2019
There is increasing evidence of microplastics appearing in water -- including a study of popular bottled water brands. See the results in our answer to the question: Is it true that there are bits of plastic in drinking water and specialty salts? How concerned should I be?

Vitamin D for Diabetes Prevention

6/08/2019
Does high-dose vitamin D help prevent people with pre-diabetes from progressing to type 2 diabetes? See the results of a major new study in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Does Dark Chocolate Improve Mood?

6/10/2019
A recent study evaluated whether eating dark chocolate improved mood and reduced levels of cortisol, a stress hormone. See the results in the What It Does section of the Dark Chocolate and Cocoa Review. Also see our Top Picks among products.

Reaction to CoQ10 and Alpha-Lipoic Acid

6/11/2019
An autoimmune syndrome possibly caused by CoQ10 was recently reported. It is similar to rare cases caused by alpha-lipoic acid. For details see the updates to the Concerns and Cautions sections of the CoQ10 and Alpha Lipoic Acid Reviews.

Glyphosate in Cheerios

6/13/2019
A new report shows the amounts of the herbicide glyphosate in oat cereals, like Cheerios, and oat-based snacks. Should you be concerned? See our updated answer to the question: How concerned should I be about glyphosate in foods and supplements?

Tart Cherry for Soreness After Exercise?

6/14/2019
Can tart cherry juice improve muscle recovery and reduce soreness after exercise? See what a new study found in our update to the question: What are the benefits of tart cherry juice?

Cocoa & Physical Performance

6/14/2019
Can a cup of cocoa a day improve physical performance? See what a recent study found in the What It Does section of the Dark Chocolate and Cocoa Review. Also see our Top Picks for cocoa powders and dark chocolates.

Melatonin for PCOS?

6/17/2019
Can melatonin help women who suffer from polycystic ovary syndrome (PCOS)? See what a recent study found in the What It Does section of the Melatonin Supplements Review. Also see our Top Picks for melatonin.

Fish Oil for Heart Failure?

6/17/2019
Can taking fish oil improve heart function in people with chronic heart failure? See the results of a recent study (and find out what type of fish oil was used) in the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks for fish oils.

NAD+ and Cancer?

6/18/2019
Supplements that raise NAD+ levels in the body have been promoted for anti-aging effects. But there is a theoretical risk that they could stimulate cancerous cells, and a CL member reported this week that a supplement containing such an ingredient, nicotinamide riboside, appeared to increase his PSA level. Learn more in the Niacin section of the B Vitamin Supplements Review.

CBD Interaction

6/21/2019
Taking CBD along with anti-seizure medication was recently reported to raise blood levels of the medication by as much as 280%. CBD can interact with many medications. For details, see the Concerns and Cautions section of the CBD Oils and Hemp Extracts Review. Also see our Top Picks among products.

Yogurt and Colorectal Cancer

6/21/2019
Does regular consumption of yogurt affect the risk of colorectal polyps and colorectal cancer? Find out what studies are showing in the Fermented Dairy Foods section of the Probiotic Supplements Review.

Vitamins Needed by Pregnant Women

6/21/2019
A recent analysis of nutrient intakes by pregnant women across the U.S. revealed the vitamins and minerals they were getting too much or too little of. Get the details in the Prenatal section of the Multivitamins Review, which includes our tests of prenatal supplements.

Prebiotic for Insulin Sensitivity

6/24/2019
Does consuming a prebiotic improve insulin sensitivity in overweight people? See what a study recently found in the All About Prebiotics section of the Probiotic Supplements Review.

Fish Oil Heart Claim

6/28/2019
You'll start seeing a new heart health claim on fish oil supplements as well as foods that provide the omega-3's EPA and DHA. While legal, the claim is a bit fishy. Get the details in the Fish Oil Supplements Review as well as the Canned Tuna and Salmon Review. Also see our Top Picks for fish oil supplements and canned fish.

Popular Probiotic -- What's In a Name?

6/28/2019
Does the popular probiotic VSL#3 contain a different formula than used in the clinical studies supporting its benefits? Find out in the What to Consider When Buying section of the Probiotics Supplements Review. Also see our Top Picks for probiotic supplements.

July

Best Way to Take CBD

7/01/2019
If you use CBD, it's important that you take it in a way that maximizes its absorption. To learn more, see the What to Consider When Using section of the CBD Oils and Hemp Extracts Review, where you'll also see results of a new study showing that how you take CBD may dramatically affect how long it remains in your body. Also see our Top Picks among products.

Adding Fish Oil to Statins?

7/01/2019
Does adding high-dose fish oil help reduce triglycerides in people who already take statins? See the results of a new study in the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks among fish oils.

Licorice Danger

7/01/2019
A woman suffered a stroke after consuming a supplement for indigestion that contained a large dose of licorice. Get more details in our answer about licorice tea.

Casein Peptides for Better Sleep?

7/05/2019
People with difficulty sleeping were given a casein hydrolysate to see if it would help them sleep. Find out if it worked in the Casein section of the Protein Powders, Drinks and Shakes Review. Also see our Top Picks among casein and other protein products.

Infection from Probiotic

7/05/2019
Although rare, be aware that infections have occurred in some people due to the probiotics they have taken. For details about recent cases, see the Concerns and Cautions section of the Probiotic Supplements Review. Also see our Top Picks among probiotics.

Vitamin D for Depression?

7/08/2019
Can supplementing with vitamin D help people who suffer from depression? Recent studies suggest it may benefit some. See the details in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Does Tart Cherry Improve Memory?

7/12/2019
Can tart cherry juice improve memory and cognitive function? See the results of a recent study in our full answer to the question: What are the benefits of tart cherry juice?

Liver Toxicity With Turmeric

7/12/2019
Although uncommon, there are now several recent reports of liver toxicity associated with turmeric or curcumin supplements. Get the details in the Concerns and Cautions section of the Turmeric and Curcumin Supplements Review. Also see our Top Picks for turmeric and curcumin.

Ginger's Blood-Thinning Effect

7/12/2019
If you supplement with ginger, be aware of its blood-thinning effect, as exemplified in a recent case report. For details, see the Concerns and Cautions section of the Ginger Supplements & Ales Review. Also see our Top Picks among products.

Is Methylfolate the Best Form of Folate?

7/15/2019
Methylfolate has been promoted as a better form of folate (vitamin B9), particularly for people with certain common genetic variations. A clinical study recently put methylfolate to the test against folic acid and folinic acid. The results were surprising. Get the details in the Folate section of the B Vitamin Supplements Review. Also see our Top Picks among folate and other B vitamin supplements.

Do Vitamin Patches Work?

7/15/2019
We've added important new information to our answer to the question: Do Vitamin Patches Work?

Has UC-II Collagen Changed?

7/15/2019
UC-II is an undenatured collagen that may reduce knee pain. However, one of the more recent studies reported that it contained much less collagen than reported in earlier studies. Has UC-II changed? Find out in our updated answer to the question: What is UC-II and does it help joints?

NAC for Parkinson's?

7/15/2019
A recent, preliminary study suggested that NAC (N-acetyl-cysteine) given orally and intravenously improved symptoms in Parkinson’s disease patients. For details, see the What It Does section of the NAC Supplements Review. Also see our Top Picks for NAC as a powder, capsule, and tablet.

CBD Interactions

7/19/2019
CBD can interact with many medications, and we've just added more to the list based on a recently published review of CBD safety. Learn more in the Concerns and Cautions section of the CBD Oils and Hemp Extracts Review. Also see our Top Picks among products.

Zinc for Canker Sores?

7/19/2019
We've added information about zinc to our answer to the question: Can lysine, vitamin B-12, or other vitamins or minerals help prevent or reduce canker sores?

Is Niagen Safe?

7/19/2019
Niagen (nicotinamide riboside) was recently studied for its safety and ability to raise NAD+ in the body. See the results and learn more about this form of niacin (which is also in the product Basis) in the Niacin section of the B Vitamin Supplements Review. Also see our Top Picks for niacin and other B vitamin supplements.

Extra Virgin Olive Oil and Diabetes

7/22/2019
Several studies have looked at the effects of consuming extra virgin olive oil on improving blood sugar control. The most recent study looked at whether it could delay the need for glucose-lowering medication in people with type 2 diabetes. Get the results in the What It Does section of the Extra Virgin Olive Oils Review. Also see our Top Picks among products.

Apple Cider Vinegar for Eczema?

7/22/2019
A study recently tested whether soaking skin in diluted apple cider vinegar would improve skin integrity in people with eczema (atopic dermatitis). See the results in the What It Does section of Apple Cider Vinegar Review. Also see our Top Picks among the products we've tested.

Arginine for Men?

7/22/2019
Does daily arginine supplementation enhance the effect of a popular prescription medication for men? See what a recent study found in the What It Does section of the L-Arginine Supplements Review. Also see our Top Picks for arginine.

MCT Oil for Strength?

7/25/2019
Does adding MCTs (medium chain triglycerides) to the diets of elderly people enhance the benefit they get from exercise? See what a recently published study found in the What It Does: Muscle Strength and Function section of the Coconut Oil and MCT Oil Supplements Review. Also see our Top Picks for coconut and MCT oils.

Vitamin D for Depression?

7/26/2019
Low blood levels of vitamin D are associated with a higher risk of depression. But does taking vitamin D reduce this risk or improve mood in depressed people? Find out what recent studies have shown in the What It Does: Depression section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D among products.

Vitamin D for Allergies?

7/26/2019
If you already take an antihistamine for allergies, will adding vitamin D provide further benefit? Find out what a recent study showed in the What It Does: Allergies section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D among products.

Dark Chocolate & Depression?

7/30/2019
Are people who consume dark chocolate less likely to be depressed? Find out what a recent study showed in the Mood and Stress section of the Dark Chocolates and Cocoa Powders Review. Also see our Top Picks for dark chocolates and cocoa powders.

Fresh vs. Powdered Turmeric

7/30/2019
When adding turmeric to your meal, do you absorb more curcumin from freshly grated turmeric or turmeric powder? And how do these compare to curcumin powder? Learn the surprising answer in the What to Consider When Buying and Using section of the Turmeric and Curcumin Review. Also see our Top Picks for turmeric and curcumin.

Beetroot Juice for Raynaud's?

7/30/2019
Does drinking beetroot juice daily reduce symptoms of Raynaud's phenomenon? Learn what a recent study found in our answer to the question: Which supplements help with Raynaud's phenomenon?

August

Vitamin D & Diabetes

8/02/2019
Vitamin D supplementation can improve insulin sensitivity in some people at risk for type 2 diabetes according to a recent clinical study. For details about this, as well as related research, see the Diabetes, insulin resistance and glucose control section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Saw Palmetto for Prostate?

8/02/2019
A recent clinical study is the latest to evaluate the potential benefit of saw palmetto in reducing symptoms of benign prostatic hypertrophy (BPH) in men. Find out what this, and previous studies, have shown in the What It Does section of the Prostate Supplements Review. Also see our Top Picks for saw palmetto and beta-sitosterol supplements.

Coconut Oil In Coffee?

8/02/2019
Does adding coconut oil to caffeinated coffee boost physical performance? Find out what a recent study showed in the Sports Performance section of the Coconut Oil and MCT Oil Review. Also see our Top Picks among tested coconut and MCT oils.

Concerns With Colloidal Silver

8/02/2019
Consuming colloidal silver may affect the eyes and cause a type of vasculitis, according to recently published reports. Get the details in our answer to the question: Is ingesting colloidal silver helpful for any condition and is it safe to use?

Vitamin A and Skin Cancer

8/05/2019
A study showed that people with higher intakes of vitamin A have a lower risk of developing squamous cell cancer of the skin. Does mean that taking a vitamin A supplement will help? Find out in the What It Does section of the Vitamin A Supplements Review, where we also discuss the risk of melanoma. (Also see our Top Picks for vitamin A supplements.)

Vitamin D During Pregnancy

8/08/2019
Does giving expectant mothers a high dose of vitamin D reduce the risk of tooth defects in their children? Find out in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

CoQ10 for Fibromyalgia?

8/09/2019
A recent study evaluated whether CoQ10 improved symptoms in patients with fibromyalgia when added to standard prescription treatment with pregabalin (Lyrica). See the results, and learn more about what CoQ10 can and cannot do in the What It Does section of the CoQ10 and Ubiquinol Supplements Review. Also see our Top Picks for CoQ10 and ubiquinol.

Vitamin D for Breast Cancer?

8/12/2019
Some evidence suggests that having higher blood levels of vitamin D lowers the risk of breast cancer. Can very high-dose vitamin D slow tumor growth in women with breast cancer? See what a new study found in the Cancer section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D supplements.

Extra Virgin Olive Oil and Fatty Liver Disease

8/12/2019
Can consuming a Mediterranean diet enriched with extra-virgin olive oil decrease the incidence of non-alcoholic fatty liver disease? See what a new study found in the What It Does section of the Extra Virgin Olive Oil Review. Also see our tests and Top Picks among extra virgin olive oils.

Folic Acid and Colon Cancer

8/12/2019
Several studies have evaluated whether folate from food and/or folic acid from supplements affect cancer risk. Find out what a recent report suggests about long-term, high-dose folic acid supplementation in the Folate section of the B Vitamin Supplements Review. Also see our Top Picks for folic acid and other B vitamin supplements.

Green Tea and Blood Sugar

8/16/2019
Can drinking green tea reduce the rise in blood sugar after a meal, and if so, is the effect greater in the morning or evening? See what a new study found in the What It Does section of the Green Tea Review. Also see our tests and Top Picks among green tea supplements, and brewable and bottled teas.

Do Probiotics Help With Bone Facture?

8/16/2019
Can taking a probiotic improve recovery from bone fracture in older people? See what a recent study found in the Bone Density and Fractures section of the Probiotic Supplements Review. Also see our Top Picks for probiotics.

Turmeric for Knee Pain

8/19/2019
Several short-term studies have shown moderate benefit with turmeric extracts. Get the details, including results of a recent study, in the What It Does section of the Turmeric & Curcumin Supplements and Spices Review. Also see our Top Picks among products.

Omega-3s for Lowering Triglycerides

8/20/2019
Elevated triglycerides ("hypertriglyceridemia") is increasingly common in the US. High-dose omega-3s from fish oil can help, and the American Heart Association recently updated its advice about this. For details, and to learn how prescription omega-3 compares to supplements, see the Dosage section of the Fish Oil Supplements Review. Also see our Top Picks for fish oils, including highly concentrated fish oils.

A Better CBD?

8/21/2019
A formulation of CBD was shown to increase CBD levels in the blood significantly more than the same amount of CBD in oil. But is this any better than simply taking regular CBD with a meal? Find out in the How to Take section of the CBD Oils and Hemp Extracts Review. Also see our Top Picks among products.

Effect of High-Dose Vitamin D on Bones

8/26/2019
A 3-year study among people with osteoporosis compared the effects of moderate vs. high doses of vitamin D on bone density and bone strength. The results may surprise you. Get the details in the How Much Do You Need and How Much is Too Much? section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D supplements.

Whey Protein for Muscle Gain and Fat Loss?

8/26/2019
Did drinking whey protein after resistance exercise help prevent muscle loss and reduce body fat in obese women? See what a recent study found in the Building and maintaining muscle section of the Protein Powders, Shakes and Drinks Review. Also see our Top Picks for protein powders and shakes.

CBD Questioned for Epilepsy

8/26/2019
Although CBD has been approved in the U.S. for treating seizures associated with rare forms of epilepsy, a review in Europe raised concerns. For details see the What It Does section of the CBD Oils and Hemp Extracts Review. Also see our Top Picks among products.

Can Yogurt Reduce Diabetes Risk?

8/28/2019
Increasing yogurt intake, particularly in place of certain other dairy foods, may decrease the risk of developing type 2 diabetes. For details about this and other effects of yogurt, see the Fermented Dairy Foods section of the Probiotics Supplements Review. Also see our Top Picks for probiotics.

Glucosamine for Hand Osteoarthritis?

8/29/2019
A new study suggests that glucosamine may help people with hand osteoarthritis. Get the details in the What It Does section of the Joint Health Supplements Review. Also see our Top Picks for joint health supplements.

Microplastics in Food and Water

8/29/2019
How many microplastic particles do we consume each year from our food and water? Find out in the updated answer to the question: Do water filters remove microplastics from tap water?

September

Collagen for Wrinkles?

9/02/2019
A new study put a popular branded collagen ingredient to the test, measuring its effects on collagen content in the skin and on facial wrinkles, including wrinkles around the eyes. See the results in our updated answer to the question: Do collagen or hyaluronic acid supplements really help aging or wrinkled skin?

Curcumin and Crohn's Disease

9/02/2019
Can curcumin help prevent recurrence in people with Crohn's disease? See what a recent study found, plus the evidence for curcumin in other conditions, in the What It Does section of the Turmeric and Curcumin Supplements and Spices Review. Also see our Top Picks for turmeric and curcumin supplements and spices.

Probiotic to Trim Belly Fat?

9/06/2019
Can a probiotic reduce abdominal fat? See what studies are showing, including the latest surprising results, in the Weight section of the Probiotic Supplements Review. Also see our Top Picks for probiotic supplements.

CBD Missing in Some Products

9/06/2019
A class action lawsuit was filed against a popular brand after independent tests showed its products to contain much less CBD than listed. See the Quality Concerns section of the Review for details.

Vegetarian Chondroitin for Knee Pain?

9/06/2019
Can "vegetarian" chondroitin reduce knee pain and improve mobility? See what a recent study found in the What It Does section of the Joint Health Supplements Review. Also see our Top Picks for glucosamine and chondroitin supplements.

Best Supplement for Depression

9/09/2019
Which supplement has the strongest evidence of benefit for treating mental disorders? The answer is a particular form of fish oil to treat depression, according to a new analysis. For details, see the Depression section of the Fish Oil Supplements Review. Also see our Top Picks among products.

Apple Cider Vinegar for Type 2 Diabetes?

9/09/2019
Studies have shown that taking apple cider vinegar with or before a meal can reduce the subsequent rise in blood sugar. But does apple cider vinegar improve insulin sensitivity in people with type 2 diabetes? Find out what a recent study showed in the Blood Sugar Control section of the Apple Cider Vinegar Review. Also see our Top Picks for apple cider vinegar.

Ginger for Migraine?

9/09/2019
Can ginger reduce the frequency or severity of migraines? See what a new study found in the Migraine section of the Ginger Supplements Review. Also see our Top Picks for ginger supplements.

Ashwagandha for Stress and Anxiety

9/16/2019
Can ashwagandha decrease symptoms of anxiety and lower levels of a stress hormone? See what a new study found in the Anxiety, Stress and Insomnia section of the Ashwagandha Supplements Review. Also see our Top Pick for ashwagandha.

Omega-3s for Cognition?

9/16/2019
Several studies have attempted to boost cognition and memory in healthy people using omega-3 supplements from fish or krill oil. Find out if they succeeded, including a recent study among adolescents, in the Memory Enhancement in Healthy Individuals section of the Fish Oil Supplements Review. Also see our Top Picks among products.

Fish Oil in Pregnancy?

9/16/2019
Several studies have evaluated the effects of taking fish oil during pregnancy, including a recent study seeking a reduction in premature births. Find out if fish oil helps in the During Pregnancy: Effects on Children section of the Fish Oil Supplements Review. Also see our Top Picks for fish oil.

Vitamin B12 & Sleepiness

9/20/2019
Vitamin B12 deficiency can cause a range of symptoms and, although rare, excessive daytime sleepiness is among them. Get the details about this, as well as information about other symptoms of B12 deficiency, in the B12 section of the B Vitamins Supplements Review. Also see our Top Pick for vitamin B12.

Probiotic for the Urinary Tract?

9/20/2019
Does taking a popular double-strain probiotic reduce the level of pathogenic microbes in the urinary tracts of women? See what a recent study found in the section about Vaginal bacterial infections of the Probiotic Supplements Review. Also see our Top Picks among probiotics.

Lead in Turmeric

9/23/2019
A new report reveals that in some parts of the world where turmeric is grown, lead is being intentionally added. Find out where and why in the Quality Concerns section of the Turmeric and Curcumin Review. ConsumerLab tests all turmeric root powder products for lead and other heavy metals.

Does Green Tea Prevent Cognitive Decline?

9/23/2019
Does drinking green tea reduce the risk of cognitive decline and, if so, how much do you have to drink? A multi-year study addressed this question. See the results in the Memory and Cognition section of the Green Tea Review. Also see our Top Picks for green tea.

Vitamin D Sprays

9/23/2019
Are oral vitamin D sprays better than vitamin D capsules? Find out what studies are showing in the Oral Sprays section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Who's Not Getting Enough Protein?

9/27/2019
A recent study among older Americans identified groups that are not getting enough protein. Find out who's not getting enough protein in the What It Does section of the Protein Powders and Drinks Review. Also see our Top Picks among protein products.

Dark Chocolate for Vision Improvement?

9/27/2019
Does consuming flavanol-rich dark chocolate improve visual acuity? See what a recent study found in the Vision section of the Cocoas and Dark Chocolates Review. Also see our Top Picks for dark chocolate, cocoa powder, and nibs.

Vitamin D and Risk of Cancer Death

9/30/2019
Are you more likely to survive colorectal cancer if you have higher blood levels of vitamin D? Find out in the Cancer section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Microplastics in Tea

9/30/2019
A new study found that brewing tea with certain tea bags can release a large amount of microplastics into the liquid. For details, see the Brewing section of our Green Tea Review. Also see our Top Picks among green tea products.

Probiotic for Cold Symptoms and Gas

9/30/2019
A study found that a particular probiotic strain reduced symptoms of upper respiratory infections, as well as gas, in children. For details see the Colds and acute respiratory infections section as well as the Bloating, gas, and abdominal pain section of the Probiotic Supplements Review. Also see our Top Picks for probiotics and kombucha.

October

Better Memory With Lutein?

10/04/2019
Lutein is often taken as a supplement to slow the progression of age-related macular degeneration. However, a study in college students suggests that supplementation with lutein may also improve aspects of memory and cognitive functioning. For details, see the What It Does section of our Vision Supplements Review.

L-Theanine for Sleep and Cognition?

10/04/2019
Several studies have evaluated whether a single dose of L-theanine (found in green tea) can reduce stress and anxiety. A new study has evaluated the effect of L-theanine when taken daily for several weeks. See the results in the What It Does section of the L-Theanine Supplements Review. Also see our top choices for L-Theanine.

Extra Protein During Chemotherapy?

10/04/2019
Is taking extra whey protein during chemotherapy helpful to malnourished cancer patients? Learn what a study found in the What It Does section of the Protein Powders, Shakes, and Drinks Review. Also see our Top Picks among protein powders.

Caution With Probiotic & Surgery

10/07/2019
Use of a popular probiotic around the time of abdominal surgery increased the rate of re-admission to the hospital after surgery, according to a recent study. For details, see the What It Does section of the Probiotic Supplements Review. Also see our Top Picks for probiotics.

Melatonin & Post-Op Delirium

10/07/2019
Reduced melatonin levels following surgery have been implicated in the development of post-operative delirium. But does taking melatonin around the time of surgery reduce this risk? Find out in the What It Does section of the Melatonin Supplements Review. Also see our Top Picks for melatonin.

Fish Oil to Improve Cognition?

10/07/2019
See the results of the most recent study of fish oil to improve memory and cognition in the Memory Enhancement section of the Fish Oil Supplements Review. Also see our Top Picks for fish oil.

Does CBD Convert to THC in the Body?

10/07/2019
Laboratory studies have raised concerns that CBD could convert to THC (a psychoactive compound in cannabis) after ingestion. A recent study put this to the test in people. See what happened in the What To Consider When Buying and Using section of the CBD Oil and Hemp Extracts Review. Also see our Top Picks among products.

Eggshell Membrane for Bad Knees?

10/10/2019
Eggshell membrane, which naturally contains collagen, was tested as a supplement to improve knee pain, stiffness, and function. Find out if it worked in the Joint Pain section of the Collagen Supplements Review. Also see our Top Picks for collagen.

Risk from Reusing Plastic Water Bottles

10/10/2019
Repeatedly opening and closing plastic water bottles can pose a risk, according to a new study. Get the details in our updated answer to the question: Is it true that there are bits of plastic in drinking water and specialty salts? How concerned should I be?

Lycopene for Male Fertility?

10/10/2019
Read about the latest study to suggest that lycopene may improve sperm health in the What It Does section of the Lycopene Supplements Review. Also see our Top Pick for lycopene.

Collagen Peptides vs. Gelatin

10/14/2019
It has been generally believed that amino acids are more bioavailable from hydrolyzed collagen (collagen peptides) than from gelatin (which is partially hydrolyzed collagen). A new study put this to the test. See what the researchers found in the What It Is section of the Collagen Supplements Review. Also see our Top Picks among collagen supplements.

Ashwagandha for Insomnia?

10/14/2019
Does ashwagandha help people with insomnia fall asleep and stay asleep? See what a new study showed in the What It Does section of the Ashwagandha Supplements Review. Also see our Top Pick for ashwagandha.

Vitamin D & Blood Sugar Control

10/14/2019
Maintaining moderate levels of vitamin D may aid blood sugar control, but, according to a recently published study, high-dose vitamin D supplementation may not help. For details, see the Diabetes, insulin resistance and glucose control section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Black Seed Oil Concern

10/14/2019
A key compound in black seed oil may interact with medications, causing side effects. For details, see the Safety section of our answer to a question about black seed oil.

How to Use Fish Oil for Depression

10/17/2019
Guidelines have been published for using fish oil to treat major depressive disorder. For details, see the Depression section of the Fish Oil Supplements Review. Also see our Top Picks for fish oil.

Pill-Induced Esophagitis

10/18/2019
Several cases of esophagitis have been reported from taking supplements, including a recent case involving l-arginine capsules. For details, including tips on how to safely take pills, see the Concerns and Cautions section of the L-Arginine Supplements Review. Also see our Top Picks for L-Arginine.

Should Women Take Calcium?

10/21/2019
Do women reduce bone loss and the risk of fractures if they take a calcium supplement? See what a recent study showed in the What It Does section of the Calcium Supplements Review. Also see our Top Picks for calcium supplements.

Does Magnesium Reduce Exercise Soreness?

10/21/2019
Can taking magnesium reduce muscle soreness after exercise? See what a new study found in the What It Does section of the Magnesium Supplements Review. Also see our Top Picks for magnesium supplements.

Milk Thistle Interaction

10/21/2019
Milk thistle may interact with certain drugs, as noted in a recent case report. For details see the Concerns and Cautions section of the Milk Thistle Supplements Review. Also see our Top Picks for milk thistle.

Caution With Elderberry

10/23/2019
Although rare, a case of acute pancreatitis was reported after the use of a popular elderberry extract supplement. Get the details in our updated answer to the question: Do any supplements help prevent or treat a cold?

Pycnogenol for Raynaud's?

10/25/2019
A new study investigated whether Pycnogenol can help treat Raynaud’s phenomenon, a condition in which hands become painful and discolored when exposed to cold temperatures. Find out if it helped in the update to the question: What is Pycnogenol and does it work?

CBD Safe for Pets?

10/25/2019
A recent study evaluated the safety of giving CBD to dogs and cats. See the results in the Pets section of our CBD and Hemp Extracts Review. Also see our Top Picks among products for pets as well as for people.

Liver Toxicity With Turmeric/Curcumin

10/29/2019
Several cases of liver toxicity from turmeric and curcumin supplements have been reported. For details, and the latest case, see the Concerns and Cautions section of the Turmeric and Curcumin Supplements Review.

Eye Risk With High-Dose Niacin

10/31/2019
Very high doses of niacin are sometimes used to lower high cholesterol, but there are risks -- including damage to the eye, as shown in a recent case. Get the details in the Niacin section of the B Vitamin Supplements Review.

November

CoQ10 for Statin-Intolerance

11/08/2019
Many people experience muscle pain from taking cholesterol-lowering statin drugs. CoQ10 can help reduce this pain, according to a new study. Get the details in the What It Does section of the CoQ10 Supplements Review. Also see our Top Picks among CoQ10 supplements.

Supplement for Social Anxiety?

11/08/2019
High-dose CBD was given to teenagers with social anxiety. Learn what happened in the Anxiety, PTSD, and Sleep section of the CBD and Hemp Extract Review. Also see our Top Pick among products.

Choline Concern

11/08/2019
A large study found that people with higher intakes of choline from their diets had a higher risk of death, specifically cardiovascular death, than people with lower choline intakes. Should you be concerned? See the Concerns and Cautions section of the Choline Supplements Review.

Platelet Concern With High-dose Niacin

11/10/2019
Long-term use of high-dose niacin may lower platelet counts. Learn more in the Niacin section of the B Vitamin Supplements Review.

Green Tea & Stroke

11/11/2019
Studies have found green tea consumption to be associated with a decreased risk of stroke. However, a recent study found this to be the case for only for one gender. For details, see the What It Does section of the Green Tea Review. Also see our Top Picks for green tea.

Help for Jaw Pain?

11/11/2019
Can CBD ointment relax and reduce pain in the jaw muscles of people who grind their teeth? See what a recent clinical study found in the What It Does section of the CBD and Hemp Extract Review. Also see our Top Picks among products.

A Chew for UTIs?

11/11/2019
A study investigated whether a cranberry chew could inhibit infection-causing bacteria from binding to cells (which is necessary for urinary tract infections to occur) by testing participants' urine. Find out if it worked in our answer to the following question: Can cranberry juice or cranberry supplements prevent urinary tract infections (UTIs)?

Fish Oil Plus Statins for High Triglycerides

11/14/2019
This week an FDA panel recommended that a prescription fish oil be approved for use with statins in people with high triglycerides. Get the details and see how fish oil supplements compare in the Fish Oil Supplements Review. Also see our Top Picks among fish oil supplements.

Be Careful With Iron

11/15/2019
Iron supplements can be hard on the stomach, but be aware that very high doses may actually cause erosions and ulcers. Certain formulations are less likely to cause this problem. For details, see the Concerns and Cautions section of the Iron Supplements Review. Also see our Top Picks among iron supplements.

Supplement for Pain?

11/15/2019
A recent study gave a modest daily dose of CBD to people with chronic pain who were taking opioid medication to see if it reduced their pain and need for medication. See the results in the What It Does section of the Review. Also see our Top Picks among products.

Concern With Ginkgo

11/15/2019
The use of Ginkgo biloba has been associated with an electrolyte imbalance. For details, see the Concerns and Cautions section of the Ginkgo Supplements Review. Also see our Top Pick for Ginkgo.

Magnesium for Memory

11/18/2019
There is growing evidence that getting the right amount of magnesium reduces the risk of developing cognitive decline and dementia. For details, including results of a new study, see the Dementia and cognition section of the Magnesium Supplements Review. Also see our Top Pick among magnesium supplements.

Fish Oil Can Reduce Cognitive Decline

11/18/2019
Another study has shown that supplementing with high-dose omega-3 fatty acids from fish oil can reduce cognitive decline in certain people. For details, see the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks among fish oils.

When Protein Won't Help

11/18/2019
Supplementing with protein can help build and maintain muscle mass, but there are times when it won’t help, as demonstrated in a recent study. For details see the Building and maintaining muscle mass section of the Protein Powders Review. Also see our Top Picks for protein supplements.

Magnesium-L-Threonate for Memory?

11/22/2019
What is the evidence that a special form of magnesium helps people with memory and concentration impairment? Find out in the Dementia and cognition section of the Magnesium Supplements Review. Also see our Top Picks among magnesium supplements.

Fish Oil & Colon Cancer

11/25/2019
There is new evidence that taking fish oil may reduce the risk of colorectal cancer for certain people. For details see the Cancer section of the Fish Oil Supplements Review. Also see our Top Picks among fish oil supplements and other marine sources of omega-3s.

B Vitamins for Cognition

11/28/2019
Increasing vitamin B-12 intake by those deficient in B-12 can help slow age-related declines in memory and cognition, but the dose needs to be sufficient, as suggested by a recent study. For details see the Memory, Cognition, and Alzheimer's Disease section of the B Vitamin Supplements Review. Also see our Top Picks for B-12 and other B Vitamins.

A Better Form of Creatine?

11/28/2019
A relatively new form of creatine may raise creatine levels in the blood and muscle more effectively than the most common form (creatine monohydrate), but it has drawbacks. Learn more in the ConsumerTips section of the Muscle & Workout Supplements Review. Also see our Top Picks for creatine.

December

Vitamin C and Kidney Damage

12/02/2019
High doses of vitamin C have been reported to cause a form of kidney damage, although this is more common in people with certain pre-existing medical conditions. For details, see the Concerns and Cautions section of the Vitamin C Supplements Review. Also see our Top Picks for vitamin C supplements.

Choline to Avoid?

12/02/2019
A recent study found that a particular form of choline is not well absorbed. It may also have detrimental effects. For details, see the Concerns and Cautions section of the Choline Supplements Review. Also see our Top Pick among choline supplements.

Garcinia Concern

12/02/2019
Another case of liver failure associated with the use of Garcinia cambogia has been reported. For details, see the Concerns and Cautions section of the Garcinia Cambogia Supplements Review.

Vitamin D & Muscle

12/06/2019
If you are looking to increase muscle mass, make sure you're getting adequate vitamin D. Raising deficient levels has been shown to increase muscle in seniors, and more recently, in men and women in their 40s. For details see the Muscle, balance and falls section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Eggshell Membrane for Joints?

12/06/2019
Eggshell membrane hydrolysates, which naturally contain collagen, have been used in clinical studies to treat joint pain. Find out if they work in the Joint section of the Collagen Supplements Review. Also see our Top Picks for collagen.

Glucosamine & Chondroitin – How They May Work

12/06/2019
A recent study suggests that one way glucosamine and chondroitin may work is through the gut. For details, see the What It Does section of the Joint Health Supplements Review (Glucosamine, Chondroitin, MSM and Boswellia). Also see our Top Picks among products.

Kava for Anxiety?

12/09/2019
See the results of a recent study with kava in our updated answer to the question: What are the best supplements for depression and anxiety?

Huperzine A for Memory?

12/09/2019
Huperzine A is often touted as a memory-enhancing supplement. Find out if it helped in a recent study of people with traumatic brain injuries in the What It Does section of the Huperzine A Supplements Review. Also see our top choice for Huperzine A.

Heart Disease & Magnesium

12/13/2019
Women with the lowest daily intakes of magnesium were found to have the highest risk of fatal coronary heart disease in a recent study, which is consistent with other studies of magnesium and heart health. See the What It Does section of the Magnesium Supplements Review for details about this association. Also see our Top Picks among magnesium supplements.

B12 & the Vegetarian

12/13/2019
Vegetarians and vegans are susceptible to vitamin B12 deficiency, which can be manifest by a range of health issues, including low blood pressure, as recently reported in an otherwise healthy young man. Learn more in the B12 section of the B Vitamin Supplements Review. Also see our Top Pick for vitamin B12.

SAMe for Depression?

12/13/2019
SAMe (S-adenosyl-methionine) may help some, but not all, people with major depressive disorder, according to a recent study. For details, see the What It Does section of the SAMe Supplements Review. Also see our Top Picks for SAMe.

High-Dose Vitamin D for the Critically Ill?

12/13/2019
Critically ill patients with vitamin D deficiency were given an extremely high dose of vitamin D to see if it would reduce deaths. Find out if it helped in the How Much Do You Need and How Much is Too Much? section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D supplements.

What Happens With Too Much Vitamin D

12/16/2019
A 50-year-old woman learned the hard way about the risks of taking far too much vitamin D. If you take a very high dose of vitamin D, be aware of the symptoms of vitamin D toxicity, as explained in the Concerns and Cautions section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Green Tea and Breast Cancer Risk

12/16/2019
Is there a relationship between green tea consumption and breast cancer risk? Learn what a large recent study showed in the Cancer Prevention section of the Green Tea Review. Also see our Top Picks for green tea -- including brewable green tea (from bags and loose tea) and green tea drinks.

Fish Oil Approved for Elevated Triglycerides

12/16/2019
A highly concentrated fish oil that was originally approved only for treating very high triglycerides has been further approved by the FDA to treat lower, but still elevated, triglycerides if cardiovascular risk factors are present. For details see the Prescription Fish Oil vs. Supplements section of the Fish Oil Supplements Review. Also see our Top Picks for fish oils, including highly concentrated fish oil.

Fish Oil for ADHD?

12/16/2019
Evidence is emerging that some ADHD patients may derive limited benefits from supplementing with omega-3 fatty acids. Get the details in the ADHD section of the Fish Oil Supplements Review. Also see our Top Picks for fish oil.