Product Reviews (59)

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CL Answers (128)

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Recalls & Warnings (75)

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Clinical Updates (30)

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6/21/2015

Probiotic Foods and Social Anxiety

A new study shows that consumption of fermented foods like yogurt and kefir (which are likely to contain probiotic organisms) was associated with lower levels of social anxiety. This suggests that such foods may serve as a low-risk intervention for reducing social anxiety. More about the study is found in the Probiotics Review >>
6/08/2017

How To Get Vitamin K From Food

Many of the benefits of vitamin K - such as proper blood clotting and calcium utilization for bone and heart health - are associated with getting adequate vitamin K from foods. The good news? Brand new research has found much higher amounts of vitamin K2 (the form associated with cardiovascular benefits) in dairy foods than previously known. However, the amounts vary tremendously depending on whether these foods are full-fat, or reduced-fat or fat-free. Get the details in the "Vitamin K from food" section of the Vitamin K Supplements Review. If you’re interested in a vitamin K supplement, see our Top Picks among brands.
8/09/2016

Spirulina Lowers Cholesterol

Spirulina, a common ingredient in greens and whole foods supplements, was found to lower total and "bad" LDL cholesterol, but only in certain people. Get the details, plus our tests of products containing spirulina, in the Greens and Whole Foods Powders, Drinks and Pills Review >>
7/09/2014

Chlorella Lowers Cholesterol and Triglycerides

A daily dose of chlorella (an ingredient included in some "greens" and whole foods supplements) significantly reduced total cholesterol, "bad" VLDL cholesterol, and triglyceride levels in men and women with mildly elevated cholesterol. Get the details, including the dosage used, plus our tests and comparisons of supplements containing chlorella and other "greens" in the updated Greens and Whole Foods Powders and Pills >> 
11/06/2018

Lower Risk of Heart Disease with Fermented Dairy Foods

A study has shown a lower risk of heart disease to be associated with consumption of fermented, rather than non-fermented, dairy foods. However, only a certain type of fermented dairy was associated with the benefit. For details, see the Fermented Dairy section of the Probiotics Review. (Also see our Top Picks among probiotic products.)
8/29/2019

Can Yogurt Reduce Diabetes Risk?

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.
1/04/2020

Foods That May Help Sleep

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?
5/26/2020

Lower Risk of Dementia Through Foods

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?
3/16/2016

Don't Take Green Tea With Iron?

A study shows that iron can bind to a key flavanol (EGCG) in green tea, causing it to lose its anti-oxidant activity. Should you avoid iron-containing foods when using green tea? Find out in the "What to Consider When Using" section of the Green Tea Supplements and Teas Review >>
7/23/2016

Vitamin C and Breast Cancer

Higher intakes of vitamin C from foods are linked to lower risk of postmenopausal breast cancer in women, but getting vitamin C from supplements on top of that may increase the risk, says a new study. Get the details in the Vitamin C Supplements Review >>
3/15/2017

Anti-Inflammatory Effect of Juice Plus+?

Chronic systemic inflammation is a risk factor for cardiovascular disease, diabetes, and cancer. A recent clinical trial assessed the product Juice Plus+ for its ability to reduce this inflammation in obese men and women. The abstract of the published study indicates that it works, but the results tell a different story. For details, see the "What It Does" section of the Greens and Whole Foods Powders, Pills, and Drinks Review (which includes our tests of products) >>
4/19/2017

Niacin & Skin Cancer

People who don't get enough niacin each day may be able to lower their risk of developing squamous cell skin cancer by getting a bit more niacin from their food or supplements suggests a recent analysis. However, this doesn't mean you should overdo it. For details, see the "Niacin" section of the B Vitamin Supplements Review. You can also find foods high in niacin using the food table in the report.
4/12/2019

Food vs. Supplements for Getting Vitamins & Minerals

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.
3/11/2017

Prebiotics for Appetite Control?

A study suggests that a prebiotic supplement may be helpful for appetite control – although more research is needed. Prebiotics fuel the growth of beneficial bacteria in the gut. For more information about the study and prebiotics (including how to get prebiotics from foods), see the "Prebiotics" section of the Probiotics Supplements Review (which includes our tests of products) >>
12/16/2017

Tea & Iron Absorption

A surprising number of foods and beverages, including tea, can interfere with the absorption of iron. When you drink your tea can make a big difference, according to a new study. Get the details in the Iron Supplements Review >>
6/06/2018

Getting Choline

Is it better to get choline naturally from foods or from supplements? A recent study addressed this question. Find out the answer in the ConsumerTips section of the Choline Supplements Review. Also see our Top Picks among products in this category.
7/13/2018

Fruit for the Eyes

Can consuming certain foods or beverages reduce the risk of developing age-related macular degeneration (AMD) – a common eye disease? Yes, according to a recent study. Get the details in the food section of the Vision Supplements Review. (Also see our Top Rated vision supplements.)
12/09/2012

Extra Protein Improves Strength

Whether you are trying to add muscle or just maintain it, a new report suggests that additional protein leads to further gains from resistance-type training. The analysis of 22 clinical studies shows that both young and old individuals who received additional protein from supplements or high-protein foods experienced significantly greater increases in muscle mass and strength than those not getting additional protein. Get the details, as well as our tests and reviews of protein powders and drinks, in the updated Protein Powders and Drinks Review (Including Sports, Nutrition, and Diet Products). More >>
4/07/2013

Omega-3s Linked to Less Heart Disease and Longer Life

A study among older individuals who did not use fish oil supplements showed that those with higher levels of omega-3 fatty acids in their blood were far less likely to have a heart attack or arrhythmia and were 27% less likely to die during the 14-year study. The reserchers calculated how much EPA and DHA a person should consume to reach this higher blood level and noted that further increases yeild little additional benefit. Get the details, as well as how to get omega-3s from foods, in the updated Fish Oil Supplements Review »
1/20/2013

Toxin in Algae Supplements

A recently published study found that supplements containing a certain type of algae were all contaminated with a toxin that is a potential carcinogen and can cause liver damage. Get more details in the recent update to the Greens and Whole Foods Powders Review >>
6/29/2017

Choline Missing From Prenatals

The American Medical Association recently voted to recommend that all prenatal vitamins include appropriate amounts of choline. Getting adequate choline may reduce the risk of birth defects in children, but most women don’t get enough and prenatal vitamins typically provide little to none. Find out how to get adequate choline from supplements and/or foods in the Choline Supplements Review, which includes our Top Picks. Also see the "Prenatal Vitamin" section of the Multivitamin Supplements Review.
6/29/2019

Fish Oil Heart Claim

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.
5/05/2018

Delaying Menopause

A new study found that diet may influence the age at which menopause occurs in women. This is important because later menopause has been associated with lower risk of many health conditions. Find out which foods are associated with later or earlier menopause in the Background section of the Menopause Supplements Review. (Also see what we found in supplements intended to treat menopause symptoms.)
11/24/2018

Yogurt & High Blood Pressure

Higher consumption of yogurt was associated with a lower risk of developing high blood pressure in a recent analysis. Risk was further reduced when yogurt consumption was part of a particular, healthful diet. For details, see the Fermented Dairy Foods section of the Probiotic Supplements Review.
5/25/2019

Concern With a Colorant

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.
6/14/2019

Glyphosate in Cheerios

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?
6/22/2019

Yogurt and Colorectal Cancer

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.
2/21/2016

Gastrointestinal Side-Effects of Chlorella

In response to a CL Answer about Spirulina, CL members have reported vomiting after using another algae-based supplement, Chlorella – a common ingredient in "greens" powders and drinks. We then reviewed clinical studies of Chlorella and found high rates of other gastrointestinal side-effects. For details see the "Concerns and Cautions" section of the Greens and Whole Foods Powders and Pills Review >>
6/22/2011

Does Taking Vitamin D Reduce the Risk of Heart Disease?

Earlier research has suggested an association between higher vitamin D levels in the blood and reduced risk of heart attack. But blood levels are affected by both sun exposure as well as intake of vitamin D. A new study shows that men with higher vitamin D intakes from foods and supplements have a 14% reduction in their risk of cardiovascular disease and stroke. However, the study found no reduction among women. The amount of vitamin D intake shown to be beneficial and possible reasons why a benefit was not found in women are provided in the updated "What It Does" section of our Product Review of Vitamin D SupplementsMore >>
12/14/2013

B-12 Deficiency and Acid Inhibitors

A large, new study found the risk of vitamin B-12 deficiency to be significantly higher among people taking proton pump inhibitors (e.g., Prevacid, Prilosec) or H2-blockers (e.g., Pepcid, Zantac) than among those not taking these medications. The drugs reduce acid production in the stomach, but acid is needed to release B-12 from foods, so deficiency can occur. B-12 supplements can help because acid is not needed for their absorption. For details -- and our reviews of supplements with vitamin B-12 -- see the updated B Vitamin Supplements Review >>   

Other supplements which should or should not be used with these medications are discussed in the Proton Pump Inhibitors article, which is part of the extensive Drug Interactions section of our website (where you can look up interactions for other drugs you may be taking.) 

News Releases (50)

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