January

CBD Cream for Pain?

1/02/2020
People suffering peripheral neuropathy in their legs and feet applied CBD cream or placebo for one month. Did it help? Find out in the Topical CBD section of our CBD Review. Also see our Top Picks among creams, oils, and other CBD products.

Curcumin for Blood Sugar Control?

1/03/2020
Preliminary research suggests that curcumin (from turmeric) taken with meals can reduce the increases in blood sugar and insulin levels that occur after eating. But does curcumin help people with pre-existing type 2 diabetes? See what a recent study found in the What It Does section of the Turmeric and Curcumin Supplements & Spices Review. Also see our Top Picks among turmeric and curcumin products.

Foods That May Help Sleep

1/03/2020
In addition to supplements like melatonin that can aid sleep, certain foods are associated with reduced risk of insomnia. We've added information about this to our answer to the question: Which supplements can help me sleep?

When to Eat Protein

1/06/2020
The timing of protein intake during the day was associated with greater reductions in abdominal fat and BMI (body mass index) among people engaged in exercise programs in a recent study. The timing of protein intake can also improve the likelihood of muscular benefits. For details, see the When to Take section of the Protein Powders and Drinks Review. Also see our Top Picks among protein products.

Eggshell Membrane for Hair, Skin, Nails?

1/06/2020
Does supplementing with eggshell membrane (which contains collagen and elastin) improve hair, skin, or nails? See what a recent study found in the What It Does section of the Collagen Supplements Review. Also see our Top Picks among collagen supplements.

Tart Cherry for Gout?

1/06/2020
A clinical trial checked whether or not tart cherry would reduce the number of flare-ups in people with gout. Find out if it helped in our answer to the question: What are the health benefits of tart cherry juice?

Zinc and Folate for Infertility?

1/06/2020
Did supplementing with zinc and folate improve semen quality and fertility for men in a recent study? Find out in the What It Does section of the Zinc Supplements Review. Also see our Top Picks among zinc supplements.

Risk With Supplements During Chemotherapy

1/10/2020
The risk of cancer recurrence and risk of death were shown to be higher when certain supplements were used by women being treated for breast cancer, according to a recent study. We’ve add details about this to our answer to the question: Do any supplements reduce side of effects of chemotherapy?

Concern With Ashwagandha

1/11/2020
Ashwagandha can increase thyroid hormone levels, resulting in thyroid toxicity, even in people without a history of thyroid disease. Read about a recent case and learn symptoms to look for in the Concerns and Cautions section of the Ashwagandha Supplements Review. Also see our Top Pick among ashwagandha supplements.

Collagen vs. Whey for Muscle

1/11/2020
Does taking collagen protein increase muscle as well as whey protein? Find out what a recent study showed in the "Building Muscle" sections of both the Protein Powders Review and the Collagen Supplements Review. Also see our Top Picks for protein powders and Top Picks for collagen.

Vitamin D & Bone Density

1/13/2020
Does taking vitamin D improve bone mineral density in older men and women who are not deficient in vitamin D? See what a major study found in the Bones and fractures section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Tea & Heart Disease

1/13/2020
Another study shows that people who drink tea are less likely to suffer from cardiovascular disease. Find out how much and what type of tea was associated with benefits in the Cardiovascular disease section of the Green Tea Review. Also see our Top Picks for green tea.

Magnesium for Leg Cramps?

1/13/2020
Magnesium if often touted for treating leg cramps. Does it really work? See what studies have shown, including a recent study among pregnant women, in the What It Does section of the Magnesium Supplements Review. Also see our Top Picks for magnesium.

Fish Oils Not Equal on Cardio Benefit

1/17/2020
High-dose, highly-concentrated fish oil is known to lower triglycerides in people with elevated levels. One prescription product was even shown to lower the risk of cardiovascular events in such people. However, a clinical trial of another fish oil was recently stopped due to its low likelihood of providing this benefit. Learn how these products differ and how fish oil supplements compare to them in the Prescription Fish Oil vs. Supplements section of the Fish Oil Review. Also see our Top Picks for fish oil and other marine omega-3 supplements.

PQQ for Athletic Endurance?

1/17/2020
We've added information from a recent study of PQQ for athletic endurance to our answer to the question: What is PQQ? Does it help with aging and memory? Is it similar to CoQ10?

Fish Oil & Fertility

1/20/2020
Is there a relationship between taking fish oil and sperm count? See what a recent study in men found in the What It Does section of the Fish Oil Review. Also see our Top Picks for fish oil.

Coconut Oil Impact on Cholesterol

1/20/2020
Coconut oil can significantly affect cholesterol levels according to a new report. Get the details in the Concerns and Cautions section of the Coconut & MCT Oils Review. Also see our Top Picks for coconut and MCT oils.

Best Way to Cook With Olive Oil

1/24/2020
Cooking can reduce levels of heart-healthy polyphenols in extra virgin olive oil (EVOO), but a new study showed how to minimize this loss. Get the details in the ConsumerTips section of the Extra Virgin Olive Oil Review. Also see our Top Picks among extra virgin olive oils.

Stevia vs. Sugar for Hunger Suppression

1/24/2020
How does the non-caloric sweetener stevia compare to sugar in suppressing hunger before a meal? Find out in our updated answer to the question: What are the health benefits of stevia? Is it safe?

When Magnesium Doesn't Seem to Help

1/27/2020
Getting the recommended amount of magnesium has been associated with bone benefits. However, there was an increased risk of hip fracture among people who used a particular form of magnesium, according to a recent analysis. Get the details in the What It Does section of the Magnesium Supplements Review. Also see our Top Pick for magnesium.

How to Use Zinc Lozenges for Colds

1/27/2020
Zinc lozenges have been shown to reduce cold symptoms, but effectiveness appears to depend on the lozenge formulation and how it is used. Learn more in the What It Does section of the Zinc Supplements and Lozenges Review. Also see our Top Picks for zinc lozenges and pills.

Is Melatonin Safe for Children?

1/27/2020
Find out what side effects melatonin had when taken for up to two years by children and adolescents in a small study. See the What It Does section of the Melatonin Supplements Review. Also see our Top Pick for melatonin.

Not Enough Vitamin C

1/30/2020
Vitamin C deficiency is known to cause scurvy, characterized by bleeding gums and other connective tissue problems. But vitamin C deficiency was recently reported to cause a very different array of symptoms in several people. Learn more in the What It Does section of the Vitamin C Supplements Review. Also see our Top Picks for vitamin C.

Collagen for Knees?

1/31/2020
Collagen supplements have been tested in many studies to reduce pain and/or improve function in osteoarthritic knees. A recent study focused on collagen peptides. Find out if they worked (and see the results for other collagen products) in the Joint Pain section of the Collagen Supplements Review. Also see our Top Picks for collagen supplements for joint pain and for wrinkles.

Pomegranate for Memory?

1/31/2020
Pomegranate juice and supplements have been promoted for improving cardiovascular health, controlling blood sugar, and inhibiting prostate cancer. Most recently pomegranate juice was tested in a year-long study for its effects on memory. Find out if it helped, and see if it works for other touted uses, in the What It Does section of the Pomegranate Juice and Supplements Review Article.

February

Berberine vs. Colon Cancer?

2/03/2020
A large study investigated the potential for berberine (promoted for blood sugar control) to prevent precancerous colon polyps. Find out if it worked in the What It Does section of the Berberine & Goldenseal Supplements Review. Also see our Top Pick for berberine.

Problems With Huperzine A

2/03/2020
A recent analysis of supplements claiming to contain huperzine A (promoted for memory enhancement) found problems with most products. For details see the Concerns and Cautions section of the Huperzine A Supplements Review. Also learn what clinical studies have shown with huperzine A in the What It Does section and see which huperzine A supplements have been Approved by CL.

Avoid Quality Problems With Fish Oil

2/06/2020
Nearly half of 17 popular fish oil supplements tested in a recently published study did not meet at least one of the quality criteria for freshness or content. Interestingly, two that passed testing were Approved by ConsumerLab, but none that failed were CL Approved. For details, see the Quality Concerns section of the Fish Oil Supplements Review. Also see our Top Picks for fish and marine oils.

Red Yeast Rice and Diabetes?

2/07/2020
The use of statin drugs, like lovastatin (Mevacor) is associated with an increase in the risk of developing diabetes. But does red yeast rice carry the same risk? See what a large study found in the Concerns and Cautions section of the Red Yeast Rice Review. Also see our Top Pick for red yeast rice.

Glucosamine and Blood Sugar

2/07/2020
Glucosamine (used to treat osteoarthritis) is a type of sugar, so does its daily use affect blood sugar levels and one's risk of developing diabetes? Find out in the Concerns and Cautions section of the Joint Health Review. Also see our Top Picks for Glucosamine, Chondroitin, MSM, and Boswellia supplements.

Vitamin D for Hives

2/07/2020
If you suffer from chronic hives (or chronic urticaria) and are deficient in vitamin D, taking vitamin D may be helpful, according to a new study. (Vitamin D may also be helpful for other skin conditions such as eczema and psoriasis.) Get the details in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Vitamin B12 and Risk of Death

2/10/2020
A study found higher blood levels of vitamin B12 to be associated with an increased risk of death -- suggesting caution when supplementing. For details, see the B-12 section of the B Vitamin Supplements Review. If you do need to supplement with B12, see our Top Pick among products.

Vinegar Makes Grilling Safer

2/10/2020
Grilling food can create cancer-causing compounds, but a study shows that vinegar can help. Find out how in the What to Consider When Using section of the Apple Cider Vinegar Review. Also see our Top Picks for apple cider vinegar.

Fish Oil for Diabetes?

2/10/2020
There is mixed evidence as to whether fish oil helps people who have diabetes. Get the details, including those of a new study, in the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks for fish oil.

Vitamin C & Lungs

2/10/2020
Supplementing with vitamin C to correct deficiency can reverse a form of lung disease, as exemplified in a recent report. For details, see the What It Does section of the Vitamin C Supplements Review. Also see our Top Picks for vitamin C.

Collagen for Sun Damaged Skin?

2/14/2020
A study suggests that fish-derived collagen can improve sun-damaged skin. For details, including dosage, see the What It Does section of the Collagen Supplements Review. Also see our Top Picks for collagen.

Cocoa for Artery Disease?

2/14/2020
People with peripheral artery disease often have trouble walking. Can flavanol-rich cocoa help? Find out what a recent study showed in the What It Does section of the Cocoa and Dark Chocolates Review. Also see our Top Picks for cocoas, chocolates, chips, nibs, and cocoa supplements.

Help for Substance Abuse?

2/14/2020
There is preliminary evidence that high-dose CBD may help people with substance abuse disorder. For details, see the What It Does section of the Review. Also see our Top Picks among products.

Saffron for Better Sleep?

2/17/2020
A recent, preliminary study suggests that saffron may help with sleep. Get the details plus information about other supplements that may help or interfere with sleep, in our answer to the question: Which supplements can help me sleep?

Vitamin K for Bone Density?

2/17/2020
Vitamin K (as MK-7) was given daily for one year to older men and women to see if it would improve bone mineral density. Some also received vitamin D and calcium. Find out if it helped, as well as the results of related studies, in the What It Does section of the Vitamin K Supplements Review. Also see our Top Picks among vitamin K supplements.

Does Ashwagandha Lower Stress?

2/24/2020
A widely available ashwagandha extract was recently tested for its ability to reduce stress, at two different doses. Find out if either worked in the What It Does section of the Ashwagandha Supplements Review. Also see our Top Pick for ashwagandha.

Cognitive Impairment From B12 Deficiency

2/24/2020
Vitamin B12 deficiency can cause a wide range of symptoms. This includes cognitive impairment, as shown in a recent case. For details about the symptoms of B12 deficiency see the B12 section of the B Vitamin Supplements Review. Also see our Top Picks for B12 and other B vitamin supplements.

Vitamin D for Mom Affects Baby's Bones

2/24/2020
Taking high-dose versus very-low-dose vitamin D during pregnancy led to greater bone density in offspring, according to a recent study. But, there are important caveats. Get the details in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

How Much Sun for Vitamin D?

2/28/2020
Is sun exposure to the hands, arms, and legs enough to boost or maintain adequate vitamin D levels? See what a recent study showed in the Getting Vitamin D from Sunlight section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Breast Cancer & Milk Consumption

2/28/2020
Is drinking milk – dairy or soy – associated with breast cancer risk? Find out what a new study found in our answer to the following question: Are there vitamins or supplements that can reduce my risk of breast cancer? Do any increase cancer risk?

Biotin May Skew Many Blood Tests

2/28/2020
If you take a high-dose biotin supplement, be aware of the growing list of blood tests with which it may interfere. See the latest information in the Biotin section of the B Vitamin Supplements Review.

March

Do Glucosamine & Chondroitin Work?

3/02/2020
After reviewing the clinical literature regarding glucosamine and chondroitin for osteoarthritis, an expert group drew conclusions regarding their efficacy. Find out what they concluded in the What It Does section of the Joint Health Supplements Review. Also see our Top Picks for glucosamine, chondroitin and other joint health supplements.

Fish Oil and Heart Disease

3/06/2020
Many studies have assessed the potential benefits of taking fish oil supplements. Results have been conflicting, but one of the largest and longest-term studies was recently published. See what it found in the What It Does section of the Fish Oil Supplements Review. Also see our general recommendations for using fish oil for heart health and check out our Top Picks for fish oil supplements.

Olive Oil and Heart Disease

3/06/2020
Does consuming olive oil instead of butter or margarine reduce the risk of heart disease? Find out what studies are showing, and the amounts of olive oil being used, in the What It Does section of the Olive Oil Review. Also see our Top Picks for olive oil.

Melatonin and Cataracts

3/06/2020
Do you have cataracts (clouded lenses of the eye)? A recent study suggests that having them removed and replaced with a certain type of intraocular lens may increase natural melatonin production. For details, see the ConsumerTips section of the new Melatonin Supplements Review. Also see our Top Picks among melatonin supplements.

Does CoQ10 Help With Statins?

3/09/2020
Many studies have looked at whether or not CoQ10 helps people with statin-associated muscle pain. Read the latest in the What It Does section of the CoQ10 and Ubiquinol Supplements Review. Also see our Top Picks for CoQ10 and ubiquinol supplements.

Staying Safe With Green Tea

3/09/2020
If you use a green tea extract (alone or as part of a supplement formula), it is important to take it with food according to several reports, as explained in the Concerns and Cautions section of the Green Tea Review. Also see our Top Picks for green tea in bags, loose, as matcha powder, and in other forms.

How Long Does Coronavirus Last On Surfaces?

3/16/2020
We've added new information about how long the coronavirus might last on packaging, and how this varies greatly depending on the package material, in our answer to the question: Can I get the new coronavirus (2019-nCoV) from supplements from China?

EPA vs. DHA from Fish Oil

3/17/2020
Some marine-based oils are higher in either EPA or DHA – key omega-3 fatty acids -- but does it matter? See what a recent study found in the What to Consider When Buying section of the Fish and Marine Oil Supplements Review. Also see our Top Picks among fish and marine oils.

CoQ10 Bioavailability

3/20/2020
CoQ10 is not well absorbed unless taken with fats or oils, such as with a meal. Bioavailability-enhanced formulations allow CoQ10 to be taken without a meal, but how good are they? We’ve added new information about one such formula and how it compares to taking regular CoQ10 in the Absorption and Bioavailability Enhancers section of the CoQ10 and Ubiquinol Supplements Review. Also see our Top Picks for CoQ10 and ubiquinol.

When to Eat Protein

3/20/2020
Some evidence indicates that it is best to distribute protein across meals throughout the day to maximize protein production in muscle. A recent study suggests that there is one meal when protein intake could be higher for nearly everyone, and there is another meal when older people particularly fall short. For details see the When to Take section of the Protein Powder and Drinks Review. Also see our Top Picks for protein powders and drinks.

Another Case of Liver Injury With Turmeric

3/24/2020
Although believed to be rare, we’ve been reporting a steady stream of cases of liver injury (hepatitis) with turmeric supplements. Learn the symptoms and read the latest in the Concerns and Cautions section of the Turmeric and Curcumin Supplements Review.

Surprising Role of Potassium in COVID-19

3/24/2020
New research out of China suggests that many patients hospitalized with COVID-19 are low in potassium. For details see the information about Potassium in our answer to the question: What are natural remedies for coronavirus (COVID-19)? Do supplements like zinc, vitamin C, or herbals work?

Collagen for the Skin

3/27/2020
Supplementing with collagen to improve aging skin is popular, but does it work? The latest study with collagen used a higher dose than other studies, but is a higher dose better? Find out in the What It Does section of the Collagen Supplements Review. Also see our Top Picks for collagen for wrinkles and for osteoarthritis.

Is Quercetin Safe?

3/30/2020
Quercetin has been proposed as a treatment for a range of medical conditions, including COVID-19, but is it safe? Find out what studies have found, including results of a recent, small clinical trial, in the Concerns and Cautions section of the Quercetin Supplements Review. Also see our Top Picks for quercetin.

Chia for Obesity?

3/30/2020
Chia seeds are highly nutritious and rich in fiber, but can they help with weight management? Find out what studies are showing, including a recent clinical trial among obese children, in the What It Does section of the Chia Seed Review. Also see our Top Picks for chia seed products.

April

Dark Chocolate for Memory?

4/04/2020
Studies show that chocolate high in flavanols can improve cognition in people with cognitive decline. Can it also boost memory in people who are cognitively healthy? Find out in the Memory section of the Dark Chocolate and Cocoa Powders Review. Also see our Top Picks for dark chocolates and cocoa powders.

Coconut Oil and Cholesterol

4/10/2020
Coconut oil is known to raise levels of LDL ("bad") cholesterol but also increase levels of HDL ("good") cholesterol. Is one more important than the other? Find out the latest information in the Cautions and Concerns section of the Coconut Oil and MCT Oil Review. Also see our Top Picks for coconut and MCT oils.

Resveratrol for Memory?

4/10/2020
A new study evaluated the effects of resveratrol on cognitive functioning in postmenopausal women. Find out if it helped in the What It Does section of the Resveratrol Supplements Review. Also see our Top Picks for resveratrol.

A Food to Slow Cognitive Decline?

4/13/2020
Adherence to a Mediterranean diet was associated with a lower risk of cognitive impairment in a major new study, but only one food within that diet -- fish -- was also linked to slower loss of cognitive function. Find out how many servings of fish had the greatest impact in the What It Does section of the Fish Oil Supplements Review. Also see if fish oil supplements help and see our Top Picks for fish oil.

Also see our Top Picks for canned tuna and salmon.

Zinc Concern

4/13/2020
Zinc is a popular supplement right now due to COVID-19, but be aware that taking large doses of zinc for a long period of time can suppress the immune system by causing or exacerbating copper deficiency. Certain people may be more at risk for this. Get the details in the Cautions and Concerns section of the Zinc Supplements and Lozenges Review.

Curcumin, Insulin & Alzheimer's?

4/17/2020
Curcumin (from turmeric) may provide a modest benefit in people with insulin resistance and a new study suggests this may also reduce biomarkers of Alzheimer's disease. For details, see the What It Does section of the Turmeric and Curcumin Supplements and Spices Review. Also see our Top Picks for curcumin.

Magnesium Can Boost Cognition

4/18/2020
A clinical study has shown that cognitive function can be improved by as much as 9% in some people just by supplementing with magnesium. Get the details and find out if magnesium might help you in the What It Does section of the Magnesium Supplements Review. Also see our Top Picks for magnesium.

Does Protein Powder Affect Blood Flow?

4/20/2020
Does supplementing with whey protein isolate affect blood flow through the aorta and to the brain? Find out what a recent study found in the What It Does section of the Protein Powders & Drinks Review. Also learn what effects protein powder has on building and maintaining muscle and see our Top Picks for protein powders.

Melatonin During Chemotherapy?

4/21/2020
Does melatonin improve sleep quality and have other benefits during chemotherapy for breast cancer? Find out what a recent study showed in the What It Does section of the Melatonin Supplements Review. Also see our Top Picks for melatonin.

Early Sign of Thiamin Deficiency

4/27/2020
Thiamin (vitamin B1) deficiency can cause lasting neurologic damage and affect heart function. It can occur with poor nutrition and as a result of taking certain diuretics. A recent case highlighted an early sign of thiamin deficiency that involves the eyes. We've added this information to the Thiamin section of the B Vitamin Supplements Review. Also see our Top Pick for thiamin and B complexes that contain thiamin. You can also get thiamin from a good multivitamin.

A Role for Vitamin K in COVID-19?

4/27/2020
A new study showed a link between vitamin K and the development of COVID-19. Learn what this means in the What It Does section of our Vitamin K Supplements Review. Also see our Top Pick among vitamin K supplements.

Alpha Lipoic Acid and Reflux

4/29/2020
A CL member reported experiencing acid reflux when using alpha lipoic acid. This effect has been reported in clinical studies with higher doses -- which is not surprising consider that alpha lipoic acid is, after all, an acid. Ways to avoid this issue are discussed in the Concerns and Cautions section of the Alpha Lipoic Acid Supplements Review. Also see our Top Picks for alpha lipoic acid.

May

Can Garlic Slow Atherosclerosis?

5/01/2020
Can taking a garlic supplement slow the build-up of plaque in arteries? See what a new study found in the What It Does section of the Garlic Supplements Review. Also see our top choices for garlic supplements.

Does Fish Oil or Curcumin Increase Brain Blood Flow?

5/01/2020
A study among people ages 50 to 80 evaluated the effects of fish oil and curcumin on blood flow to the brain and on other aspects of cardiovascular function. See the results in the "What It Does" section of the Fish Oil Supplements Review and the Curcumin Supplements Review. Also see our Top Picks for fish oil and curcumin.

Does Too Much Vitamin D Hurt Muscle?

5/04/2020
A study among women given moderately high doses of vitamin D found that they lost strength. Further analysis of the data suggests why. Get the details in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

CBD for Osteoarthritis Pain

5/04/2020
A recent study, conducted in dogs, showed promise for CBD in reducing pain and inflammation due to osteoarthritis (pain due to worn joints). See the details in the What It Does section of the CBD and Hemp Extracts Review. Also see our Top Picks for CBD for people and for pets.

Low-Cal Orange Juice For Kidney Stones?

5/11/2020
Increasing citrate intake may reduce the risk of kidney stones. Find out how effective low-cal orange juice is at increasing citrate in our answer to the question: Can lemon juice, lemonade, or other juices reduce my chances of getting kidney stones?

High Blood Pressure Risk With Too Much Folic Acid During Pregnancy

5/14/2020
While it is important to take folate during pregnancy, a new study suggests that too much folic acid from supplements increases the risk of high blood pressure in mothers. See the details in the Folic Acid section of the B Vitamin Supplements Review.

Also see our Top Pick among prenatal vitamins, which provides adequate (but not too much) folic acid, in our Multivitamin and Multiminerals Supplements Review.

"Whole Grain" Is Not Enough

5/18/2020
Not all "whole grain" products are equal when it comes to minimizing swings in blood sugar, according to a new study. Get the details in the Benefits section of the Oat Cereals Review. Also see our Top Picks among oat cereals.

Potassium Levels Decline

5/18/2020
An analysis of blood samples of thousands of Americans suggests a slight decline in potassium intake. Find out what may be causing this in the update to the What It Does section of the Potassium Supplements Review. Also see our Top Picks for potassium supplements.

Generic Fish Oil Approved

5/22/2020
The first generic version of icosapent ethyl (Vascepa) was recently approved by the FDA. But don’t expect it on the market soon. See the details in the prescription omega-3s section of the Fish Oil Supplements Review, which includes comparisons with fish oil supplements. Also see our Top Picks for fish oils, including highly concentrated versions.

CBD Label Inaccuracies

5/22/2020
Tests of CBD products purchased at local stores showed that many provided much less CBD than claimed. Get the details in the Products on the Market section of the CBD and Hemp Extracts Review. Also see our Top Picks for CBD products.

Lower Risk of Dementia Through Foods

5/25/2020
A 20-year study showed that the risk of Alzheimer's disease and other forms of dementia was 76% lower in people who ate more of certain foods. Find out what they ate and learn if supplements can help in our answer to the question: Do any supplements really help with brain function, like memory and cognition?

Ashwagandha for Better Sleep?

5/26/2020
Ashwagandha, which is often used for anxiety and stress, was recently tested in people with insomnia. Did it help them fall asleep? Find out in the What It Does section of the Ashwagandha Supplements Review. Also see our Top Pick for ashwagandha.

Probiotic to Reduce Tooth Staining

5/28/2020
A probiotic was tested to see if it could reduce the occurrence of black stains (a type of dental plaque) on teeth. Find out if it worked in the What It Does section of the Probiotic Supplements Review. Also see our Top Picks among probiotics.

Is CBD Safe?

5/29/2020
Find out the most common adverse events reported for a popular line of CBD products in the Concerns and Cautions section of the CBD Oils and Hemp Extracts Review. Also see our Top Picks among products.

Cranberry for Cystitis in Men?

5/29/2020
Cystitis (inflammation of the bladder) is common in men undergoing radiation therapy for prostate cancer. A study evaluated whether a cranberry supplement could reduce the incidence of cystitis in these men. Find out if it helped in our updated answer to the question: Are cranberry supplements helpful for men? Can they help with symptoms of prostatitis or urinary tract infections?

June

Ubiquinol for Fatigue?

6/01/2020
Does taking ubiquinol (the active form of CoQ10) help men and women who are experiencing fatigue in daily life? Find out what a recent study showed 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 COVID-19 Patients

6/01/2020
A study evaluated the effects of giving vitamin D, magnesium, and vitamin B12 to COVID-19 patients. See the results in the COVID-19 section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Melatonin for Sleep and Parkinson's

6/05/2020
Melatonin is known to trigger sleep, but can it help people with Parkinson’s disease? See the results of the latest study in the What It Does section of the Melatonin Supplements Review. Also see our Top Picks for melatonin.

Probiotics That Do or Don't Work

6/08/2020
An expert panel of gastroenterologists reviewed the clinical evidence for probiotics in preventing or treating C. difficile infection, IBS, ulcerative colitis, Crohn's disease, pouchitis, and necrotizing enterocolitis. Find out for which conditions they recommend probiotics and for which they don't in the What They Do section of the Probiotic Supplements Review (we've highlighted their recommendations in yellow). Also see our Top Picks for probiotics.

A Role for Calcium in COVID-19?

6/08/2020
A preliminary study suggests a possible role for calcium supplementation in treating COVID-19. See the details in the COVID-19 section of the Calcium Supplements Review. Also see our Top Picks among calcium supplements.

Vitamin D and COVID-19 Risk

6/12/2020
Vitamin D deficiency was associated with an increased risk of testing positive for coronavirus according to a recent study. For details see the COVID-19 section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Do Zinc Lozenges Help?

6/13/2020
Several individuals diagnosed with COVID-19 began using zinc lozenges after they became sick. Find out if this was reported to help or not in the COVID-19 section of the Zinc Supplements Review. Also see our Top Picks for zinc supplements and lozenges.

Benefit of Eating Fish

6/13/2020
Increasing intake of omega-3 fatty acids through greater fish intake was shown to provide some cognitive improvements to children according to a recent study. For details, see the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks for fish oil and Top Picks for canned tuna and salmon (good sources of omega-3s).

Whey vs. Casein vs. Neither

6/16/2020
A study among elderly men engaged in strength training compared the effects of supplementing with whey protein, casein protein, or neither. Learn what the study showed in the What It Does section of the Protein Powders Review. Also see our Top Picks among protein powders.

Most Avocado Oils Fail Tests of Quality and Purity

6/19/2020
The vast majority of avocado oils purchased in the U.S. were found to be stale or contain other oils, such as soybean oil, in a study by academic researchers. Get the details, along with the names of oils that passed testing, in the Quality Concerns section of our avocado oil article.

Low Potassium in COVID-19 Patients

6/19/2020
Patients hospitalized with COVID-19 have often been found to have low potassium levels. Should you be concerned? Learn more in the COVID-19 section of the Potassium Supplements Review. Also see our Top Picks among potassium supplements.

Fish Oil for Improved Insulin Sensitivity?

6/22/2020
Fish oil was given for three months to people with decreased sensitivity to insulin. Did it improve insulin sensitivity? Find out in the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks among fish oil supplements.

Does Vitamin D Harden Arteries?

6/23/2020
Vitamin D regulates calcium levels in the body but does taking high-dose vitamin D lead to arterial calcifications (hardening of the arteries)? Find out what a 3-year study showed in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements.

Signs of Too Much Vitamin D

6/26/2020
Doctors were surprised to discover that symptoms exhibited by a 64-year old woman were due to very high levels of vitamin D from supplements. Learn about the symptoms of too much vitamin D in the Concerns and Cautions section of the Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements and learn How Much Is Too Much vitamin D.

Fish Collagen Allergy

6/26/2020
Be aware that some people may be allergic to fish collagen even if they don't respond to common fish allergy tests, according to a recent study. Get the details in the Concerns and Cautions section of the Collagen Supplements Review. Also see our Top Picks for collagen supplements for skin and for joints.

Factors For Lower Risk of Dementia

6/26/2020
Diet and lifestyle factors were associated with up to 60% reductions in the risk of developing Alzheimer dementia according to a new study. Learn about these lifestyle factors in the updated answer to the question: Do any supplements really help with brain function, like memory and cognition?

Getting the Most from Green Tea

6/29/2020
Our Green Tea Review shows that matcha green tea provides higher amounts of healthful catechins than regular green tea. This week, we added information about why this is as well as the results of a new study showing which type of matcha provides the highest levels of polyphenols (i.e., catechins). For details see the What to Consider When Buying section of the review. Also see our Top Picks among green tea products.

CBD for Sleep?

6/29/2020
The ability of CBD to improve sleep may depend on the dose given and whether there are underlying conditions causing a sleep problem. See the results of the latest study and learn more in the What It Does section of the CBD and Hemp Extracts Review. Also see our Top Picks for CBD.

July

Lycopene for Wrinkles?

7/02/2020
A recent study tested the effects of lycopene supplementation on wrinkles around the eyes ("crow's feet") in older women. Find out if it helped in the What It Does section of the Lycopene Supplements Review. Also see our Top Pick among lycopene supplements.

Vitamin D & Coronavirus

7/03/2020
Studies are linking low blood levels of vitamin D to higher risk of testing positive for the coronavirus and/or developing more severe disease. Find out what blood levels appear to be protective, as well as the results of the most recent study, in the COVID-19 section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Caution with Plant-Based Milks for Children

7/06/2020
Substituting plant-based milks for milk or infant formula can be dangerous to children when the nutritional content is inadequate. For details, see the Concerns and Cautions section of the Plant-Based Milks Review. Also see how products compare nutritionally and our Top Picks among plant-based milks.

Vitamin D and COVID Severity

7/07/2020
Another study suggests a link between having an adequate level of vitamin D and the severity of COVID-19 in patients. For details, see the COVID-19 section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Vitamin D & Osteoarthritis

7/07/2020
Vitamin D may, in certain situations, reduce knee pain and improve function in people with knee osteoarthritis (due to worn cartilage). Vitamin D may also reduce foot pain associated with knee osteoarthritis, according to a recently published study. For details, see the Osteoarthritis section of the Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements.

Coconut Oil for Lowering Weight and Cholesterol?

7/13/2020
Can adding coconut oil to dinner lower weight and/or lower cholesterol levels? See what a new study found in the What It Does section of the Coconut and MCT Oils Review. Also see our Top Picks among coconut oils and MCT oils.

Precaution When Taking Iron

7/13/2020
Supplementing with iron can cause constipation and even bowel obstruction. Find how to reduce these risks when taking iron in the ConsumerTips section of the Iron Supplements Review. Also see our Top Picks for iron.

Selenium & COVID-19

7/17/2020
Selenium-deficient people were more likely to die from COVID-19 than those who were not deficient according to a recent study. For details, see the What It Does section of the Selenium Supplements Review. Also see our Top Pick for selenium.

Vitamin D and Risk of Death

7/17/2020
Increasing vitamin D blood levels was associated with a lower risk of death over time in a recently published long-term study, but only up to a certain level. Find out at what vitamin D blood level the benefit ended in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D and be aware of how much is too much vitamin D.

Omega-3s and the Brain

7/20/2020
To raise levels of DHA and EPA in the brain, large doses are needed according to a recent study. Even larger doses are needed by people with a gene associated with increased risk of Alzheimer's. While the study did not show an effect on people's cognitive scores, it may help explain why some studies with fish oil show little effect. For details, see the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks among fish oils.

Cinnamon for Prediabetes?

7/20/2020
Does taking a daily cinnamon supplement help control blood sugar in people with pre-diabetes? See the results of a recent study in the What It Does section of the Cinnamon Supplements & Spices Review. Also see our Top Picks among cinnamon supplements and among cinnamon spices.

How Much Vitamin D from Sunshine?

7/27/2020
Does exposure to midday sun increase already sufficient vitamin D blood levels? Get the surprising answer from a new study in the Getting vitamin D from sunlight section of the Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements.

Fish Oil for Arthritis?

7/27/2020
Fish oil has shown modest benefits in rheumatoid arthritis, but can it help with osteoarthritis -- inflammation due to worn joints? Find out what a recently published study showed in the What It Does section of the Fish Oil Supplements Review. Also see our Top Picks for fish oil.

Can Alpha-Lipoic Acid Lower Weight?

7/27/2020
Alpha-lipoic acid was given to overweight men and women for 24 weeks in a recent study. Find out if it lowered weight and triglyceride levels in the What It Does section of the Alpha Lipoic Acid Supplements Review. Also see our Top Picks for alpha-lipoic acid.

August

Magnesium Helps Vitamin D

8/01/2020
Magnesium can boost blood levels of an important form of vitamin D, according to a recent study. For details on how much magnesium to take and when, see the Magnesium affects vitamin D levels section of the Vitamin D Supplements Review. To find a good magnesium supplement, see our Top Picks for magnesium.

Ginseng for Liver?

8/01/2020
Does taking ginseng lower blood markers of liver disfunction? Find out what a recent study showed in the What It Does section of the Ginseng Supplements Review. Also see our Top Picks for ginseng.

Vitamin D and Depression

8/03/2020
Can taking 2,000 IU of vitamin D daily lower the chance of developing depression? Find out what a major study showed in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks among vitamin D supplements.

Ubiquinol & Heart Surgery

8/03/2020
Ubiquinol (the active form of CoQ10) can have a beneficial effect on ailing hearts, but can taking it protect the heart around the time of aortic valve replacement? Find out what a recent study showed in the What It Does section of the CoQ10 and Ubiquinol Supplements Review. Also see our Top Picks for Ubiquinol and CoQ10.

Chocolate and Cancer

8/05/2020
Can eating more chocolate reduce cancer risk? Find out what a recent study showed in the What It Does section of the Dark Chocolates, Cocoa & Cacao Powders, Nibs, and Supplements Review. Also see our Top Picks for dark chocolate, chocolate chips and cocoa powders.

B Vitamins and Fracture Risk

8/05/2020
High homocysteine levels have been linked with increased fracture risk in older people. Taking B vitamins can lower homocysteine levels, but does it lower fracture risk? Find out what a recent study using folic acid and B12 showed in the What It Does section of the B Vitamin Supplements Review. Also see our Top Picks for B vitamins.

Vitamin D and Vertigo

8/07/2020
A common form of vertigo has been linked to vitamin D deficiency, but can taking a vitamin D supplement help prevent episodes of vertigo? Find out what a recent study showed in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Chocolate to Improve Body Composition?

8/10/2020
Can eating a small amount of chocolate every day help improve body composition? Find out what a recent study showed in the What It Does section of the Dark Chocolates, Cocoa & Cacao Powders, Nibs, and Supplements Review. Also see our Top Picks for dark chocolate, chocolate chips and cocoa powders.

CBD Reduces Cannabis Use

8/10/2020
CBD can reduce cannabis use, but only when taken at the right dose, according to a recent study. Find out what dose of CBD helped most in the What It Does section of the CBD & Hemp Extract Supplements Review. Also see our Top Picks for CBD.

Milk Thistle for Menopause?

8/13/2020
Can taking milk thistle relieve hot flashes during menopause? Learn what a new study showed in the What It Does section of the Milk Thistle Supplements Review. Also see our Top Pick among milk thistle supplements. (Also see our Menopause Supplements Review for information and reviews of products containing soy and red clover isoflavones, black cohosh, or progesterone cream.)

Eggshell Membrane + Fish Oil for Joint Pain?

8/13/2020
Both eggshell membrane and fish oil have been shown to bring modest reduction in joint pain, but does taking these ingredients together have greater benefit? Find out what a new study showed in the What It Does section of the Collagen Supplements Review. Also see our Top Pick among collagen supplements for joints and for skin.

Zinc for Lowering Blood Sugar and Cholesterol?

8/17/2020
Zinc may help lower blood sugar as well as cholesterol levels, according to a recent analysis, but the dose and duration of zinc supplementation made a big difference. Get the details in the What It Does section of the Zinc Supplements and Lozenges Review. Also see our Top Picks for zinc.

Vitamin D Deficiency & COVID Death Risk

8/17/2020
A new study suggests a link between vitamin D deficiency and higher risk of death in COVID-19 patients. For details, see the COVID-19 section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Can a Multivitamin Reduce Colds and Flu?

8/20/2020
Can regularly taking a multivitamin reduce the chance of getting a cold or flu, or lessen the symptoms and duration of illness among older people? Find out what a recent study showed in the What They Do section of the Multivitamin and Multimineral Supplements Review. Also see our Top Picks among multivitamins for women, men, seniors, children and pets.

Caution With Melatonin & Diabetes

8/20/2020
Research is raising concern regarding the use of melatonin by people with diabetes. For more details – as well as other concerns with melatonin – see the Concerns and Cautions section of the Melatonin Supplements Review. Also see our Top Picks for Melatonin.

Ashwagandha for Sleep

8/20/2020
Can ashwagandha help people with insomnia fall asleep and stay asleep longer? Find out what studies are showing in the What It Does section of the Ashwagandha Supplements Review. Also see our Top Picks for ashwagandha.

Beetroot for High Blood Pressure?

8/20/2020
Beetroot juice can lower blood pressure – but by how much? Learn what a recent study showed in our updated answer to the question: Can beetroot juice or supplements help lower my blood pressure?

Calcium & Artery Calcification

8/24/2020
Is there an increased risk of coronary artery calcification with the use of calcium supplements? Find out what a recent analysis showed in the Heart Attack and Stroke Risk section of the Calcium Supplements Review. Plus, learn how much calcium one needs per day and how much, if any, can come from supplements. Also see our Top Picks for calcium.

B-12 Supplements vs. Injections

8/24/2020
Can taking a B-12 supplement work as well as an injection to correct vitamin B-12 deficiency? See what a new study found in the B-12 section of the B Vitamin Supplements Review. Also see our Top Picks for vitamin B-12 and other B vitamin supplements.

Vitamin K & Heart Health

8/25/2020
Can taking vitamin K supplements improve vascular stiffness or lower blood pressure in people with kidney disease? Find out what a recent study showed in the What It Does section of our Vitamin K Supplements Review. Also see our Top Picks for vitamin K.

Is Expired Green Tea Safe?

8/26/2020
We were asked if it is safe to use green tea past its "best by" date and if its flavor or health benefits would be diminished. See our answer in the How to Use section of our Green Tea Review. Also see our Top Picks for green tea – including tea bags, loose tea, matcha, and green tea supplements.

Honey for Coughs and Colds?

8/27/2020
Does honey help reduce cold symptoms and improve coughs? Find out what a recent analysis concluded in our updated answer to the question: Do any supplements help prevent or treat a cold?

Concern Over Memory Supplement Quality

8/27/2020
Many supplements with phosphatidylserine – promoted for memory enhancement -- do not contain their listed amounts of this ingredient, according to a new report. Get details and learn what clinical studies show with phosphatidylserine in our updated answer to the question: Do either phosphatidylserine or phosphatidylcholine help with memory and cognition?

Acetyl-L-carnitine + Alpha-Lipoic Acid for Lowering Blood Pressure?

8/27/2020
We were recently asked if taking a combination of acetyl-L-carnitine and alpha-lipoic acid can help lower blood pressure. Find out what research shows in the What It Does section of the Acetyl-L-Carnitine Supplements Review. Also see our answer to the question: Which supplements can help to lower blood pressure?

Vitamin D for Asthma?

8/28/2020
Does giving high-dose vitamin D to children with asthma reduce their need for inhaled steroids or allow them to go longer between attacks? Find out what a recent study showed in the What It Does section of the Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Melatonin for Nightshift Workers?

8/28/2020
Does using melatonin before going to sleep in the morning improve attention and concentration in people working nightshifts? Find out what a recent study showed in the What It Does section of the Melatonin Supplements Review. Also see our Top Picks for Melatonin.

Folate & Memory

8/31/2020
Older people with high blood levels of folate are more likely to perform worse on tests of memory and cognition unless they have sufficient levels of another B vitamin, according to a recent study. Get the details in the What It Does section of our B Vitamin Supplements Review. Also see our Top Picks among B vitamin supplements.

Fish Oil Slows Atherosclerosis

8/31/2020
A highly-concentrated prescription fish oil was shown to significantly reduce the progression of atherosclerosis (hardening of the arteries) in people with high triglycerides, according to a recent study. Get the details in the Prescription Fish Oil vs. Supplements section of the Fish Oil Supplements Review. Also see our Top Picks for fish oil.

September

Seasonal Use of Vitamin D

9/03/2020
The airway's ability to fight infections is reduced during the winter/spring and vitamin D might help, according to a recent study. For details, see the What It Does section of vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Coffee and Cholesterol

9/03/2020
Drinking large amounts of coffee daily can increase cholesterol levels, according to a recent analysis. Get the details in our answer to the question: Is drinking coffee good or bad for heart health?

Vitamin D and Risk of Death

9/07/2020
Middle-aged men with very low blood levels of vitamin D were found to be much more likely to die over the next dozen years than men with the highest levels, according to a recent study. Learn more in the What It Does section of Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Resveratrol for Menopause?

9/07/2020
Can resveratrol decrease menopausal symptoms in women? Find out what a recent study showed in the What It Does section of the Resveratrol Supplements Review. Also see our Top Picks for resveratrol.

Vitamin D for Autism Spectrum Disorder?

9/07/2020
Can vitamin D improve symptoms of autism spectrum disorder? Find out what a recent study showed in the What It Does section of Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Fish Oil During Pregnancy

9/11/2020
Does taking fish oil during pregnancy lead to cognitive benefits in children? Find out what a recent study showed in the What It Does section of Fish Oil Supplements Review. Also see our Top Picks for fish oil.

Probiotic for Eczema

9/11/2020
Can applying a probiotic to the skin reduce eczema in children? Find out what a recent study showed in the What It Does section of the Probiotic Supplements Review. Also see our Top Picks for probiotics.

Green Tea and Cholesterol

9/11/2020
Can green tea help lower cholesterol levels? Find out what a recent study showed in the What It Does section of Green Tea Review. Also see our Top Picks for green tea.

Low Vitamin D and Low Blood Pressure?

9/12/2020
Vitamin D deficiency has been linked with a form of low blood pressure (orthostatic hypotension) in older men. Get the details in the What It Does section of Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Ginseng for Desire?

9/12/2020
Does ginseng improve desire and satisfaction in women? Find out what a recent study showed in the What It Does section of Ginseng Supplements Review.

Too Much Vitamin D Bad for Bone?

9/14/2020
High doses of vitamin D may lead to loss of bone mineral density in women, according to a recent study. Get the details in the How Much Is Too Much section of our Vitamin D Supplements Review. Also see our Top Picks for vitamin D.

Olive Oil & Breast Cancer Risk

9/14/2020
Is olive oil consumption associated with a lower risk of breast cancer in women? See what a recent analysis found in the What It Does section of the Extra Virgin Olive Oil Review. Also see our Top Picks for olive oil.

Preventing Muscle Loss with Leucine?

9/14/2020
Do supplements with leucine (a branched-chain amino acid or BCAA) prevent muscle loss when muscles are immobilized (such as in a leg brace)? See what a recent study showed in the What It Does section of our Muscle & Workout Supplements Review.