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Product Reviews (35)
Black Currant Oil, Borage Oil, Evening Primrose Oil, Flaxseed Oil, and Hemp Oil Supplements Review: Sources of ALA and GLA (Omega-3 and -6 Fatty Acids)
CL Answers (55)
Does CoQ10 reduce wrinkles, increase skin elasticity, or tighten the skin? Are there any other supplements that can help?
What is BioSil? Can it really increase collagen production and strengthen hair, skin, nails and bones?
I thought the B vitamins were all water soluble and did not build up in the body, so you would not build up toxic levels. Am I wrong?
Is ingesting colloidal silver helpful for any condition and is it safe to use? I'm seeing it promoted for many applications.
Do any supplements help with the coronavirus (COVID-19)? Do supplements like zinc, vitamin C, or herbals work?
Do Sugar Bear Hair Vitamins make hair shine, nails stronger, and help both to grow? They taste good but are super expensive.
I spend a lot of time in the sun, especially in the summer. Does this mean my vitamin D levels could get too high?
I thought resveratrol came from red wine or grape skins - what is the "Polygonum cuspidatum" I see listed on my supplement?
What are the health benefits of coconut oil and medium chain triglycerides, such as those used in Bulletproof Coffee?
I would like to try gotu kola for varicose veins but I've heard it's not safe to take. Is that true?
Can taking too much vitamin B-6 be dangerous? The label on my multivitamin states it contains 2000% of the Daily Value!
Is it better to get vitamins from foods or supplements, and are natural vitamins better than synthetic vitamins?
I read that famotidine (Pepcid) may help treat COVID-19. Is this true? Are there risks with taking famotidine?
Encyclopedia Articles (10)
Recalls & Warnings (109)
Two Makers of Weight Loss and Sex Enhancement Supplements Stopped From Making Unsubstantiated Claims
Skin Measurement Device Used to Select Nutritional Supplements Not Approved for This Use, FDA Warns
Seller of Red Rice Yeast With CoQ10, Respiratory Supplement And More Warned For Manufacturing Violations and Drug Claims
Two Makers of Weight Loss and Sex Enhancement Supplements Stopped From Making Unsubstantiated Claims
Ginkgo, Milk Thistle, Cleanse and Nopal Supplement Maker Warned For Manufacturing Violations, Drug Claims
Marketers of "Genetically Customized" Supplements Settle FTC Charges of Deceptive Health Claims
Cardio, Energy and Sexual Enhancement Supplement Distributor Warned For Manufacturing Violations and Drug Claims
Seller of Turmeric, Milk Thistle and More Warned for Manufacturing Violations, Drug Claims
FDA Warns Seller of Arthritis, Blood Pressure, Diabetes Supplements For Making Drug Claims
Seller of Green Tea, Prostate, Pain Supplements and More Warned for Manufacturing Violations and Drug Claims
Seller of "NaturalDoctor" Vitamin C, Echinacea and More Warned for Manufacturing Violations
Manufacturer of Heart, Multivitamin, Cranberry, and Longevity Supplements Warned For Adulteration and Drug Claims
Supplement Company Warned For Medical Claims and Misbranding Of Omega-3, CoQ10, Noni Juice And More
Recall of Calcium & Magnesium Softgels Containing Excessive and Potentially Toxic Amounts of Vitamin D
Clinical Updates (24)
Phytoceramides for Aging Skin?
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?
Eggshell Membrane for Hair, Skin, Nails?
Niacin Reduces Skin Cancer
A recent study suggests that high-dose niacin (vitamin B-3) may reduce the risk of developing certain types of skin cancer. A closer look at the study, however, raises questions about its relevance to people in North America. Get the details, as well as more information about niacin and our product test results & comparisons, in the B Vitamin Supplements Review >>
Vitamin A and Skin Cancer
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.)
Collagen for the Skin
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.
Collagen for Wrinkles?
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?
Skin Rash from Ginkgo
Although not common, be aware that skin reactions have been reported from taking Ginkgo biloba. The most recent report involved a young man who experienced symptoms the same day he began taking a popular ginkgo supplement. See the details in the "Concerns and Cautions" section of the Ginkgo Supplements Review >>
Apple Cider Vinegar for Eczema?
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.
Melatonin for Itchy Skin
Atopic dermatitis is an itchy inflammation of the skin, affecting up to 10% of adults and 30% of children. A recent study in children and adolescents with atopic dermatitis found that taking melatonin modestly reduced symptoms and, not surprisingly, reduced the time needed to fall asleep. For details about this and other uses of melatonin, as well our reviews of available melatonin supplements (including several similar to the one studied), see the Melatonin Supplements Review >>
Niacin Helps Prevent Skin Cancers
A study published this week showed that taking a form of niacin daily significantly lowered the rate of new basal-cell and squamous-cell skin cancers in patients with a history of such cancers. For details about the supplement and dose, see the B Vitamins Review >>
Collagen for Sun Damaged Skin?
Probiotic for Eczema
Cocoa for Wrinkles?
A study in older women found that drinking a high-flavanol cocoa drink each day increased skin elasticity. And while wrinkles deepened among those drinking a placebo, they stayed stable in the cocoa-drinking group. For details about the amount of cocoa consumed (and its flavanol content), as well as our tests of flavanols (and contaminants) in popular cocoa powders and chocolates, see the Cocoa Powders, Dark Chocolate, Extracts, Nibs, & Supplements Review >>
Probiotic for Dermatitis
Atopic dermatitis is a recurrent, itchy inflammation of the skin. Taking a daily probiotic mixture was found to significantly reduce symptoms and the need for topical steroids in children with atopic dermatitis. Details are in the "What It Does" section of the Probiotic Supplements Review >>
Vitamin D for Hives
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.
Niagen Form of Niacin May Cause Flushing
Niacin is known to cause flushing (redness) and skin tingling at moderate doses. Other forms of niacin are said cause less flushing. One of these is Niagen. However, results of a recently published study suggest that it can cause flushing and "hotness" after just a single dose. More details are in the "Niacin" section of the B Vitamin Supplements Review >>
Is rubbing a cream into your skin a good way to get magnesium? We reviewed several studies of magnesium creams or sprays, including one just recently published. See what we found in the "What It Does" section of the Magnesium Supplements Review -- which includes our Top Picks among magnesium supplements.
NAC Reduces Compulsive Picking
A number of studies have shown that N-acetyl cysteine (NAC), a supplement with wide variety of uses, may also reduce compulsive behaviors. The most recent study showed significant improvement in adults with skin picking disorder. Details about this and other studies with NAC, and our ratings of NAC supplements, are found in the N-Acetyl Cysteine Supplements Review >>
Berberine Side Effect
Supplements that contain berberine (a compound extracted from goldenseal) can cause a range of side effects, in addition to drug interactions. It was recently reported that berberine can cause a rare, but severe, skin reaction. Learn more in the Concerns and Cautions section of the Berberine and Goldenseal Supplements Review. Also see our Top Pick among products in this category.
Astaxanthin for Sun Protection?
Vitamin D and Sunscreen
Fish Collagen Allergy
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.
Eggshell Membrane + Fish Oil for Joint Pain?
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.