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Product Reviews (37)
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 (68)
What are phytoceramides? Do phytoceramide supplements really work to improve aging skin?
Phytoceramide supplement information, including what they are, what they claim to do, and if they have anti-aging effects.
Does CoQ10 reduce wrinkles, increase skin elasticity, or tighten the skin? Are there any other supplements that can help?
Learn about CoQ10 and other supplements, such as collagen and cocoa, for reducing wrinkles and improve aging skin.
Do collagen or hyaluronic acid supplements really help aging or wrinkled skin?
Find out if collagen & hyaluronic acid supplements really help for aging or wrinkled skin and for skin care.
Can bloodroot or "black salve" treat skin cancer? Is it safe?
Bloodroot salve and black salve made from bloodroot and zinc - are they effective and safe treatments for skin cancer? ConsumerLab.com's answer explains.
Do any supplements or foods help prevent sunburn or skin damage from sun exposure? Can any increase your risk of sun-related skin damage?
Find out which supplements may help protect from sunburn and sun-related skin damage, including beta-carotene, vitamins A and C, and cocoa.
Which vitamins and supplements are good for acne, and are there any that make it worse?
Information about supplements for acne and clearer skin. Plus, find out which vitamins and supplements can make acne worse.
Which is the best mask to prevent COVID-19 and how do cloth, disposable, N95, and KN95 masks compare? How can I stop glasses from fogging?
See our Top Picks for masks. Learn how to make COVID-19 masks from materials at home that can be almost as effective as surgical mask and N-95 masks.
Can eating almonds reduce wrinkles?
Find out if eating almonds can reduce wrinkles or improve aging skin.
Does silica have health benefits? What is BioSil, and can it really increase collagen production and strengthen hair, skin, nails and bones?
Information about the health effects of silica (silicon dioxide) and orthosilicic acid (an ingredient in BioSil), including whether these forms of silicon can really increase collagen production, thicken hair, strengthen nails & bones.
What are the health benefits of avocado oil? Is it healthier than olive oil? Which avocado oils are best?
Learn about the health benefits of avocado oil and how it compares to olive oil, evidence for heart health, osteoarthritis and other uses. ConsumerLab.com's answer explains.
Which sunscreens and after-sun products are contaminated with benzene and which are not?
Over 200 sunscreens and after-sun products have been reported to be contaminated with benzene, a carcinogen. See the results, by brand, and find out what to look for, and what to avoid, when choosing a sunscreen or after-sun product.
To prevent ticks, is it safe to spray permethrin on sleeping bags or bedsheets, as well as clothes?
Find out how permethrin sprays differ and which can be used on sheets and sleeping bags versus clothing
Is there evidence that d-limonene can help fight cancer?
Find out if d-limonene can help fight cancer or help for GERD (gastroesophageal reflux disorder), including evidence from clinical studies.
Do zinc supplements contain lead?
Learn more about the possible presence of toxic heavy metals like cadmium, lead, and arsenic in zinc supplements.
Is ingesting colloidal silver helpful for any condition and is it safe to use? I'm seeing it promoted for many applications.
Find out if there is evidence showing colloidal silver can help to treat infections, boost the immune system, help with arthritis and more, plus find out if colloidal silver can cause blue skin or other side effects.
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?
Learn more about water-soluble B vitamins including niacin, B6, B12 and folic acid, and why taking too much of these vitamins can be toxic. See the symptoms of overdose and toxicity from B vitamins. ConsumerLab.com's answer explains.
Does heat kill coronavirus (COVID-19)? Can it disinfect face masks and packages?
Find out if heat kills the coronavirus SARS-CoV-2 that causes COVID-19 infection. Learn what temperature kills the coronavirus and more. ConsumerLab explains.
Is it true that iodine can cause acne or other skin problems?
Information on iodine causing acne and other skin problems such as rashes and hives. ConsumerLab.com's answer explains.
What is the difference between cysteine and cystine?
Find out the difference between cysteine and cystine amino acids, including where each is found and their functions.
What are the symptoms of vitamin B6 deficiency?
Learn more about symptoms of B6 deficiency, who is more likely to be deficient in vitamin B6 as well as how much vitamin B6 you should be getting. ConsumerLab.com's answer explains.
Can taking too much vitamin B-12 be dangerous? The label on my B-complex states it contains 50,000% of the Daily Value!
Find out the daily value for vitamin B-12 and the potential side effects of taking too much B-12. ConsumerLab explains why taking too much vitamin B-12 can be harmful.
Do UV light sanitizing wands and boxes kill coronavirus (COVID-19)?
UV light is promoted as an effective and convenient alternative to chemical disinfectants, but can it work against the coronavirus? Learn the the pros and cons and see our reviews and comparisons of popular UV devices on the market.
Are there side effects from collagen supplements?
Find out if there are collagen side effects from supplements (collagen hydrolysate, collagen peptides, etc.) such as nausea, constipation, skin rash and others. ConsumerLab.com's answer explains.
What are the benefits of grape seed extract?
Learn about the health benefits of grape seed extract, and find out it improves venous insufficiency, leg swelling, swelling after surgery, or can help to lower blood pressure.
Do collagen supplements impact cholesterol levels or reduce risk factors for atherosclerosis?
Collagen has been studied for its effects on cholesterol levels and atherosclerosis risk factors, but its effects are still not clear.
How do the Pfizer, Moderna and Johnson & Johnson COVID-19 vaccines compare in terms of efficacy, safety and side effects? How, when and where do I get the COVID-19 vaccine?
Find out how the COVID-19 vaccines from Pfizer and Moderna compare and learn how when and where you can get the COVID-19 vaccine.
What are the health benefits of dark chocolate?
Information on the health benefits of dark chocolate, including how dark chocolate may improve heart health, decrease blood sugar levels and more. ConsumerLab.com's answer explains.
Do Sugar Bear Hair Vitamins make hair shine, nails stronger, and help both to grow? They taste good but are super expensive.
Info on Sugar Bear Hair vitamins. Do they make hair shine, nails stronger and help hair and nails grow? ConsumerLab.com's answer explains.
Do any supplements help with the coronavirus (COVID-19)? Do supplements like vitamin D, zinc, vitamin C, or herbals work?
Find out if natural remedies & supplements for coronavirus such as zinc, vitamin C, garlic, or elderberry help to prevent or treat COVID-19.
What is monolaurin? Can it really prevent colds, cold sores, or other infections?
Lauricidin (monolaurin) information for preventing colds, immune system function, and safety.
What is Pycnogenol and does it work?
Learn more about Pycnogenol, including evidence from clinical studies on blood clots, osteoarthritis, cognition, vision, tinnitus, and the skin and safety.
I spend a lot of time in the sun, especially in the summer. Does this mean my vitamin D levels could get too high?
Find out if spending too much time outside, especially in the summer, can cause excess vitamin D levels in the body.
Can beetroot juice or supplements help lower my blood pressure?
Learn more about beetroot juice and beetroot supplements and if beetroot can really help lower blood pressure.
Is there a risk of liver toxicity with certain supplements?
Find out if there is risk of liver damage from supplements such as green tea, niacin, red yeast rice and vitamin A.
Can any supplements be used to reduce inflammation in people sensitive to NSAIDs such as ibuprofen, high-dose aspirin, or naproxen?
Find out if supplements such as turmeric, fish oil, MSM (methylsulfonylmethane), SAMe (S-adenosyl-methionine), boswellia, ginger, white willow bark or arnica may, or may not, be helpful to people sensitive to NSAIDs.
Does tea tree oil work for getting rid of athlete's foot?
Learn more about tea tree oil and its effects on foot fungus (known as athlete’s foot, tinea pedis, or “ringworm” due to the lesion that can occur) and how it can be as effective as some, but not all, over-the-counter antifungal treatments. ConsumerLab explains.
Does collagen taken as a supplement help with arthritis? I'm seeing it in products for joint health.
Learn more about collagen supplements, including evidence from clinical studies on arthritis and muscle strength and safety.
Which is the best pulse oximeter for home use?
Best pulse oximeter for home use (COVID-19, asthma and COPD). Differences between home use and FDA-approved medical pulse oximeters.
Why is beta-carotene still an ingredient in some supplements? Isn't it dangerous?
Beta-carotene can be found in supplements. Get clinical evidence from studies on beta-carotene's impact on mortality, smoking, and vision.
I would like to try gotu kola for varicose veins but I've heard it's not safe to take. Is that true?
Learn more about gotu kola, including possible benefits for varicose veins and whether it is safe to take. ConsumerLab explains.
What are the signs of iron deficiency anemia?
Find out the signs and symptoms of iron deficiency anemia, such as fatigue, shortness of breath, rapid heartbeat and others.
How does bone broth protein compare to other types of protein?
Bone broth protein supplement information, including their effectiveness compared to other types of protein, how much collagen they contain, and safety.
What are the health benefits of bone broth, and which bone broth is the best?
Learn about the health benefits of bone broth, a good source of protein and collagen, including whether bone broth can help for joint pain or osteoarthritis, improve skin or reduce wrinkles, heal the gut or boost the immune system. Plus, see ConsumerLab.com's tests of popular bone broths, find out how much collagen they contained, and which bone broths are best.
What is inositol hexaphosphate (IP6) and myo-inositol? Are they helpful in treating cancer or other conditions?
Inositol hexaphosphate (IP6): Find out if IP6 (also known as phytic acid) can prevent or treat cancer. Clinical evidence, dosage, safety and how IP6 differs from myo-inositol. Consumerlab.com's answer explains.
Do magnesium creams, sprays and oils help with muscle pain and cramps? How about supplements?
Find out if magnesium oils, creams and sprays, such as BetterYou, really work to help fibromyalgia, muscle pain, cramps, relaxation or sleep. ConsumerLab.com's answer explains.
Is it possible to get too much vitamin D?
Too much vitamin D can lead to adverse effects, including hypercalcemia (excess calcium in the blood).
Is it dangerous to use certain herbals, vitamins, or other dietary supplements when breastfeeding?
Find out which supplements should be avoided when breastfeeding, including medicinal herbs, soy, and flaxseed.
I thought resveratrol came from red wine or grape skins - what is the "Polygonum cuspidatum" I see listed on my supplement?
Find out where resveratrol in supplements comes from, including Polygonum cuspidatum and red wine extract.
What are the side effects of glucosamine and chondroitin?
Learn the side effects of glucosamine and chondroitin supplements for joint health and joint pain, including stomach upset, headache, and many others. ConsumerLab.com's answer explains.
How much bone broth do I need to consume in order to get a benefit?
Bone broth daily consumption information and benefits, including how much protein and collagen ConsumerLab found in popular products. ConsumerLab.com's answer explains.
What are the side effects of magnesium supplements?
Info on magnesium supplement side effects, such as stomach upset, nausea and diarrhea. Learn about magnesium dosage, safety and drug interactions. ConsumerLab.com answer explains.
What is CELLFOOD and is it a healthy supplement?
Learn more about CELLFOOD (NuScience Corporation), including if the claims to improve athletic performance, fibromyalgia, weight loss, and cancer are true.
Do diamine oxidase (DAO) supplements for histamine intolerance really work?
DAO supplement info for histamine intolerance, including diamine oxidase safety, evidence from clinical studies, and dosage.
Which supplements help with Raynaud's phenomenon?
Raynaud's phenomenon may be helped by some supplements. Learn more about fish oil, Gingko biloba, and ginseng.
My HDL (good) cholesterol level is low. Should I take niacin to raise my HDLs?
Learn more about niacin and find out if it can raise HDL ("good") cholesterol levels.
Do any supplements reduce side of effects of chemotherapy?
Find out if there are any supplements that can help with the side effects of chemotherapy, such as nausea, vomiting, diarrhea, nerve damage and others. ConsumerLab.com's answer explains.
Do vitamin patches, such as for B12 or multivitamins, really work? How about those from PatchMD?
Do vitamin B12 Patches like PatchMD really work? Can you absorb vitamin B12 through patches?
Do lion's mane supplements improve memory or cognitive function in older adults?
Lion's mane has been studied for its effects on cognitive function and memory, but its effects are still unclear.
I developed a rash soon after starting a probiotic. Is it possible to be allergic to probiotics?
Find out if probiotics can cause allergic reactions, including skin rashes, and why.
How much resveratrol is in wine? Is it enough to have a benefit?
Find out how much resveratrol wine contains and if it is enough to have a benefit.
What are the health benefits of coconut oil and medium chain triglycerides, such as those used in Bulletproof Coffee?
Learn the health benefits of coconut oil and medium chain triglycerides (MCTs), including evidence from Bulletproof Coffee, clinical studies on obesity, skin, and Alzheimer's disease.
Can taking too much vitamin B-6 be dangerous? The label on my multivitamin states it contains 2000% of the Daily Value!
Find out if multivitamins contain excessive amounts of B-6, how much B-6 is too much, and symptoms of toxicity and overdose.
I have been having neurological symptoms. My blood test showed a toxic level of vitamin B-6. My multivitamin contains 75 mg of B-6 -- below the upper limit of 100 mg. Is the label wrong?
Find out if multivitamins contain excessive amounts ofvitamin B-6, symptoms of vitamin B-6 toxicity, and the daily upper tolerable intake level for B-6.
Which supplements are best for seasonal allergies?
Find out which supplements are best for allergies and can help reduce seasonal allergy symptoms, including bromelain, curcumin, vitamin D, and CLA.
Which oils can help lower my cholesterol and risk of heart attack? How are coconut oil, olive oil, and fish oil for example?
Find out which fats and oils, such as coconut oil and fish oil, lower cholesterol and lower the risk of cardiovascular disease.
What is vitamin B12 and how much do I need?
Vitamin B12 dosage varies depending on your age, gender, and various other factors. Our CL Answer explains why B12 is important, the recommended dosages, deficiency, health benefits, and the best form.
Is it true that protein can strain the kidneys as you get older?
Find out if protein strains the kidneys as you get older, how much protein older adults need and the best way to take protein supplements.
Is it better to get vitamins from foods or supplements, and are natural vitamins better than synthetic vitamins?
Learn more about the benefits of getting vitamins from food versus supplements, natural versus synthetic vitamins, and more.
Recalls & Warnings (126)
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
Seller of Turmeric, Milk Thistle and More 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
FDA Warns Seller of Arthritis, Blood Pressure, Diabetes Supplements For Making Drug Claims
Supplement Company Warned For Medical Claims and Misbranding Of Omega-3, CoQ10, Noni Juice And More
Manufacturer of Heart, Multivitamin, Cranberry, and Longevity Supplements Warned For Adulteration and Drug Claims
Seller of Aloe, Thyroid and Other Supplements Warned for Manufacturing Violations and 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
Recall of Calcium & Magnesium Softgels Containing Excessive and Potentially Toxic Amounts of Vitamin D
Clinical Updates (29)
Phytoceramides for Aging Skin?
Vitamin D and Melanoma
Also see our answer to the question: Do any supplements or foods help prevent sunburn or skin damage from sun exposure? Can any increase your risk of sun-related skin damage?