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B Vitamin Supplements

Review of B Vitamin Supplements

Read our reviews of B vitamin supplements to find the best B complex, niacin, B-6, B-12, biotin, thiamin and folate, including "methyl" forms such as methylfolate. Get information about dosage, safety, and B vitamins for energy, memory, depression and more.

B Vitamin Supplements Review

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Product Review

Multivitamin and Multimineral Supplements Review

Best Multivitamins In 2023 -- Caution with Gummies

CL Answer

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.

Vitamin B3 Blister Packs

CL Answer

If I already take red yeast rice, would adding high-dose niacin help further reduce my cholesterol levels, and would this be safe?

Learn more about the effect of combining red yeast, statins and high-dose niacin on cholesterol and safety.

CL Answer

Which supplements or foods can help lower cholesterol and keep my heart healthy? Are there any to avoid?

Information about heart health supplements & vitamins that help with cholesterol, including sterol esters, CoQ10, and vitamin D, and which may be bad for the heart, like calcium.

Product Review

Protein Powders, Shakes, and Meal Replacements Review

Find Out Which Protein Products Passed or Failed Our Tests

CL Answer

Does nicotinamide riboside (as in Niagen and Basis) really have anti-aging or other health benefits?

Niagen (Nicotinamide riboside) information, including if it actually provides anti-aging or other health benefits. ConsumerLab explores this question.

Product Review

Tuna, Salmon, Sardines & Herring Review (Canned and Packaged)

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CL Answer

Which vitamins and supplements should be stopped before getting blood work and laboratory tests?

Find out which vitamins and supplements can interfere with blood, urine or stool tests, and imaginging tests. Learn how B vitamins such as biotin, niacin and riboflavin, as well as calcium supplements, St. John’s wort, vitamin C, and others supplements can affect test results, as well as common foods that may interfere with tests.

Vitamin & Supplements to Stop Before Blood Tests

Product Review

Electrolytes & Sports Drinks Review

See Which Sports Drinks, Powders, and Pills Deliver the Right Electrolytes

CL Answer

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.

Liver Shape Made From Paper with Pills and Bottle Against Blue Background

CL Answer

When taking a statin drug like Lipitor or Crestor, are there supplements I should avoid or take?

Learn about the interactions between certain supplements and atorvastatin (Lipitor), rosuvastatin (Crestor), and other cholesterol-lowering statins.

Statin Interactions With Supplements -- close-up of statin medication box and tablets

CL Answer

Risks of Too Many Vitamins & Supplements

Taking too many vitamin supplements -- or taking too much of a particular supplement -- can have short and long-term adverse effects.

Too Many Vitamins

CL Answer

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.

The danger of taking too much vitamin B-12 -- bottle of vitamin B-12 with pills on the table spelling out 'B-12'

Product Review

Cholesterol-Lowering Supplements Review (Sterols/Stanols and Policosanol)

Find the Best Cholesterol-Lowering Supplement. See Which Plant Sterol and Policosanol Supplements Passed Our Tests and Are Our Top Picks.

Sterol, Stanol, and Policosanol Supplements for Cholesterol-lowering Reviewed by ConsumerLab.com

Clinical Update

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.

CL Answer

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.

B Vitamins

Clinical Update

5/31/2011

Niacin Concern Stops Cardiovascular Study

A clinical trial using high dose niacin (vitamin B3) was recently stopped by the National Institutes of Health due to lack of benefit and a small increase in strokes. Patients in the study had cardiovascular disease and were already taking a statin drug to keep LDL ("bad") cholesterol levels low. The addition of high dose niacin was intended to increase HDL ("good") cholesterol, reduce elevated triglycerides, and, most importantly, reduce the risk of heart attacks and stoke. For more information, including the amount and type of niacin used in the study and additional information about niacin and niacin supplements, see the B Vitamin Supplements ReviewMore >>

CL Answer

Do supplements help with Parkinson’s disease treatment or prevention?

Learn what has been shown with vitamins D and E, niacin, CoQ10, melatonin, creatine, SAMe, NAC, valerian, CoQ10, and CBD, as well as with coffee and the Mediterranean and MIND diets for treating and/or preventing Parkinson's disease.

Elderly man with parkinsons holding trembling hand while eating

Product Review

Nutrition Bars & Cookies Review (For Energy, Fiber, Protein, Meal Replacement, and Whole Foods)

Find the Best Nutrition Bar or Cookie. ConsumerLab Tests Reveals Not All Nutrition Bars and Cookies Contain What They Claim.

Nutrition Bars Reviewed by ConsumerLab.com (Energy, Fiber, Meal Replacement, Protein, and Whole Food Bars)

CL Answer

What are the most common, potentially dangerous interactions between supplements and drugs?

Info on the most common, potentially dangerous, interactions between drugs & supplements, including Lisinopril interactions and others.

Supplement Interactions

CL Answer

Which foods are a good source of B vitamins?

Find out which foods are a good source of B vitamins (like folate and B-12) and when you should take Vitamin B supplements.

Good Sources of B Vitamins -- selection of healthy foods including eggs, rice, nuts, seeds, salmon, chicken

Clinical Update

11/20/2011

No Benefit of Niacin with Statins

According to a recently published study, high dose niacin added to statin drug treatment does not further reduce the risk of heart attacks and stroke despite improvements in levels of HDL cholesterol and triglycerides. In fact, there was a small increase in strokes among those taking niacin. However, a role remains for high dose niacin in lipid treatment. For details, see the update to the B Vitamin Supplements Review.

Clinical Update

10/11/2016

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 >>

Clinical Update

11/20/2018

Liver Toxicity With Niacin

The death of a woman from acute liver failure highlights the risk of a particular formulation of high-dose niacin. For details, see the Niacin section of the B Vitamin Supplements Review. (Also see our Top Picks for niacin and other B vitamins.)

Product Review

Chia Seed Review — Whole, Ground, and Sprouted Seed, Seed Flour, & Supplements

Find the Best Chia Seeds, Sprouted Chia Powder, Flour, and Chia Supplements. Tests and Reviews of Chia Seeds & CL's Top Picks.

Chia supplements reviewed by ConsumerLab.com

Product Review

Oat Cereals Review

Find the Best Oatmeal, Oat Bran, Steel Cut Oats, & Cold Cereals. Popular Oat Cereals Tested -- Beware of Unexpected Gluten.

Oat Cereals Tested by ConsumerLab.com

Product Review

NAD Booster Supplements Review (NAD+/NADH, Nicotinamide Riboside, and NMN)

How Important Is Boosting NAD+ Levels? Find Out and Learn How Booster Supplements Compare.

NAD Boosters (NAD+/NADH, Nicotinamide Ribose, and NMN)

CL Answer

Which supplements and foods help with gout and which may worsen it?

Find out about the effects on uric acid levels and gout of fish and fish oil, coffee, beer, animal meat, milk proteins, vegetable proteins, fructose, lemon juice, tart cherry juice, vitamin A, vitamin C, and niacin

Woman with gout pain rubbing her foot near the big toe

Clinical Update

2/03/2023

Niacin & Cancer?

The NAD booster, nicotinamide riboside, might promote growth of existing cancers. Is there similar risk with niacin and niacinamide (nicotinamide)? Find out what evidence suggests in the Concerns and Cautions section of our NAD Booster Supplements Review.

Also, see our Top Pick among niacin supplements in our B Vitamin Supplements Review.

Clinical Update

5/03/2022

Niacin & Shock-like Symptoms

Taking very high doses of niacin can cause symptoms resembling anaphylactic shock, as was recently reported. Get the details in the Niacin section of our B Vitamin Supplements Review.

Clinical Update

7/10/2021

Niacin for Parkinson's?

Can niacin supplementation improve symptoms or slow decline in people with Parkinson's disease? See what a new study found in the Niacin section of our B Vitamin Supplements Review.

Also see our answer to the question: Do supplements help with Parkinson's disease treatment or prevention?

Clinical Update

1/10/2021

Magnesium, Niacin and Blood Pressure

Two studies this week showed the risk of high blood pressure to be lowest among people with adequate, but not excessive, dietary intakes of magnesium and niacin.

Also, see which foods are good sources of magnesium and, separately, good sources of niacin.

Clinical Update

7/10/2018

Niagen for Blood Sugar Control?

Niagen, a brand of nicotinamide riboside (a form of niacin), was recently tested in a clinical trial to control blood sugar levels. Get the results in the Niacin section of the B Vitamins Review. (Also see our Top Picks among niacin supplements.)

Clinical Update

5/16/2015

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 >> 

Clinical Update

7/20/2019

Is Niagen Safe?

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

Clinical Update

11/11/2019

Platelet Concern With High-dose Niacin

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

Clinical Update

11/01/2019

Eye Risk With High-Dose Niacin

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

Clinical Update

12/19/2023

Caution With High-Dose B Vitamins

Vitamin B-6: Regularly taking a higher than required dose of vitamin B-6 may cause nerve damage, as was recently reported. Get the details in the B-6 section of our B Vitamin Supplements Review.

Niacin: A large increase in niacin dosage may cause fainting, as was recently reported. Get the details in the Niacin section of our B-Vitamin Supplements Review.

Clinical Update

2/23/2024

Heart Concern with High-Dose Niacin

New research suggests a negative effect of high-dose niacin, possibly explaining why it doesn’t reduce cardiovascular disease despite improving cholesterol levels. For details, see the Niacin section of our B Vitamins & Complexes Review, which includes our Top Picks among products.

CL Answer

Are the "% DV" numbers on vitamin supplement labels really based on what I need?

Learn more about percent daily values, including if they are good standards of measure or if better upper and lower limits exist.

Supplement Facts on Back of Supplement Bottle

Product Review

Joint Health Supplements for Pets Review (Glucosamine, Chondroitin, MSM & Boswellia)

See Which Pet Supplements for Joint Health Passed Our Tests and Which Didn't!

Joint Health Supplements for Pets

CL Answer

Is it okay to take vitamin D3 and fish oil together?

Find out if taking vitamin D and fish oil is okay, how it effects absorption, and the best way to take vitamin D to improve absorption. ConsumerLab.com's answer explains.

hand holding vitamin D and fish oil capsules

CL Answer

I'm over 50 and looking to take a vitamin B-12 supplement. Many contain a form of vitamin B-12 called cyanocobalamin, yet I read on the Internet that this form is toxic. Should I be concerned?

Looking to see if the cyanocobalamin form of vitamin B-12 is safe? Read research and safety information on ConsumerLab's report.

Vitamin B-12

CL Answer

Which supplements can help lower my triglycerides?

Find out whether fish oil supplements, or plant-based oil supplements, such as flaxseed oil and echium oil are best for lowering triglyceride levels. ConsumerLab.com's answer explains.

Supplements to Lower Triglyceride Levels -- fish oil capsules and stethoscope

Product Review

CoQ10 and Ubiquinol Supplements Review

Find the Best CoQ10 and Ubiquinol Supplements and Learn How They Differ

CoQ10 2024

CL Answer

Can taking too much vitamin B-6 be dangerous?

Find out if multivitamins contain excessive amounts of B-6, how much B-6 is too much, and symptoms of toxicity and overdose.

Vitamin tablets placed on a table to spell B6

CL Answer

Do hair loss supplements, such as Viviscal, Hair La Vie, and Nutrafol, or topical essential oils work?

Vitamins and supplements that may help with hair loss and thinning, including saw palmetto, beta-sitosterol, protein, iron, and vitamin D.

Supplements for Hair Loss -- woman looking at hairbrush

CL Answer

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.

Getting Vitamins and Minerals from Food vs. Supplements -- fruits, vegetables, and a spoon containing supplements on a table

Product Review

Olive Leaf Extract Supplements Review

Learn What Olive Leaf Does and the Best Brands

Product Review

Fruits, Veggies, and Other Greens Supplements Review (Including Spirulina and Chlorella)

Avoid Lead in Greens, Problems with Pills, and Don't Give Up Eating Whole Foods.

Greens Review Oct 2023

Product Review

Lion's Mane and Chaga Supplements Review

Read Labels Carefully -- Many Can Mislead

Lion's Mane and Chaga Supplements tested by ConsumerLab.com

Product Review

Lavender and Tea Tree Essential Oils Review

Oils Tested for Authenticity and Purity

Clinical Update

1/13/2021

Nicotinamide Riboside to Slow Aging and Reverse NAD+ Decline?

Nicotinamide riboside, a form of niacin, has been promoted to slow aging, partially based on the belief that it raises NAD+ levels that fall with age. A new study raises doubts about this. Get the details in the Niacin section of our B Vitamin Supplement Review. Also, learn about a concern with taking too much nicotinamide riboside.

Clinical Update

7/19/2014

High-Dose Niacin with Statins Not Worth It

Further evidence was published this week showing that the addition of high-dose niacin (vitamin B-3) to cholesterol-lowering treatment with statin drugs provides no worthwhile benefit and appears to increase the risk of adverse side events. For details, see the Review of B Vitamin Supplements and Energy Drinks >> 

Clinical Update

9/19/2017

Niacinamide for Alzheimer's Disease?

Niacinamide (a form of niacin) has been promoted as a way to protect against memory loss associated with Alzheimer's disease – a claim based on studies in mice. A recent study put this to the test in people. See the results in the "Niacin" section of the B Vitamin Supplements Review >>

Clinical Update

10/24/2015

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 >>

Clinical Update

3/17/2013

Concern Over Niacin

You may have heard that a recent study suggests that supplementing with niacin at high doses does more harm than good. This appears to be true in only certain situations. Get the facts in the update to the B Vitamin Supplements Review >>

Product Review

Vitamin C Supplements Review

Find the Best Vitamin C Supplements

Vitamin C Review 2023

News Release

June 14, 2022

Best B Complexes, B12, and Other B Vitamin Supplements Revealed by ConsumerLab Tests: Beware of High Doses

  White Plains, New York, June 14, 2022 — Recent ConsumerLab tests of over 30 popular vitamin B complexes and supplements revealed that four products contained either much less, or much more, of at least one B vitamin listed on the label.

CL Answer

Can vitamins or other supplements cause a change in the ability to taste, or even a loss of taste?

Find out if supplements or vitamin deficiencies can cause changes in taste, loss of taste or smell. Information about vitamin D, zinc, vitamins A, B6, B12 and others. Plus medications and medical conditions that can alter taste and smell. ConsumerLab.com's answer explains.

Vitamin Deficiency, Supplements and Loss of Taste? -- man with salad looking disinterested, unhappy

CL Answer

I've been taking a Daily Advantage multi but am now concerned by the very high % DV for vitamin C (833% DV), niacin (325% DV), and B vitamins (over 1,000% DV for several). What do you think?

Learn about the safety of taking multivitamins containing far more than Daily Values, including upper and lower limits for nutrients.

CL Answer

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.

Wooden spoon filled with white inositol capsules

CL Answer

What are the possible health benefits of fenugreek, and is it safe?

Fenugreek is promoted for boosting testosterone, increasing breastmilk production, lowering blood sugar, improving symptoms of polycystic ovary syndrome (PCOS), and other conditions, but does it work? Find out.

Fenugreek seed powder and capsules containing fenugreek

Product Review

L-Arginine Supplements Review

Choose the Best L-Arginine Supplement. Find Out Which L-Arginine Supplement Passed CL's Tests.

L-Arginine Supplements Reviewed by ConsumerLab.com

CL Answer

I read that sterol supplements to lower cholesterol like CholestOff can block the absorption of vitamins. Is that true?

Find out if CholestOff and other sterol supplements can block vitamin absorption in the body and other safety concerns.

Elderly Man Reading Supplement Bottle

CL Answer

Which supplements can help to lower blood pressure?

Supplements to lower blood pressure, including CoQ10, vitamin C, fish oil, and olive oil, are all explored to find out what works.

Supplements that can lower, or raise blood pressure -- blood pressure cuff and bottle of pills

CL Answer

I take warfarin (Coumadin), an anticoagulant drug. Are there supplements I should avoid, or be taking, due to this drug?

Find out which supplements should be avoided when taking blood thinners (anticoagulants) like warfarin (Coumadin), including vitamin K, St. John's wort, and curcumin.

Warfarin Supplement Interactions -- bottle of pink warfarin tablets

CL Answer

The maker of my multivitamin says it doesn't include folic acid because too much from supplements can be harmful. Is that true?

Learn more about the harmful effects from too much folic acid, including increased risk of prostate cancer and kidney damage.

Harm from Too Much Folic Acid ? -- Multivitamin bottle and label

CL Answer

What B-vitamin complex do you recommend for older people?

Vitamin B complex supplement recommendations, benefits and top rated brands for older people and all ages.

B Vitamins

News Release

February 12, 2021

Don't Be Surprised by New Labels on Many Vitamins

White Plains, New York, February 12, 2021 — It took almost four years, but more accurate labels on vitamin and mineral supplements are finally here and consumers should not be surprised to see changes, says Tod Cooperman, M.D., president and founder of ConsumerLab.

CL Answer

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.

Supplements for Raynaud's Phenomenon -- woman standing outside in snow, with cold, red hands

CL Answer

Can prenatal vitamins have too much folic acid? Mine has 800 mcg, but isn't that more than what's recommended? Is this dangerous to me or my baby?

Is it possible for prenatal vitamins to have too much folic acid? Find out the correct dosage so that it is not dangerous to babies.

Too Much Folic Acid in Prenatal Vitamins? -- Pregnant woman taking supplements

News Release

June 25, 2019

ConsumerLab Tests Reveal Best B Vitamin Supplements -- 19% of B Vitamin Supplements Fail CL's Tests of Quality

White Plains, New York, June 25, 2019 — B vitamins and complexes are among the most popular supplements sold in the U.S. because B vitamins are essential for a wide range of functions in the body.

Product Review

Green Coffee Bean Extract Supplements Review (for Weight Loss)

Choose the Best Green Coffee Bean Extract. 50% of Green Coffee Bean Extract Supplements Don't Deliver Expected Ingredients.

Green Coffee Bean Extract Supplements Reviewed by ConsumerLab.com

CL Answer

What is desiccated beef liver? What is it used for, and is it safe?

Description of desiccated beef liver, including what it is used for, its nutrient content, and safety concerns.

Beef liver powder

Product Review

Lactose Intolerance Products Review (Lactase Enzyme Supplements and Lactose-Free Milks)

Choose the Best Lactase Enzyme Supplement and Lactose-Free Milk. Find a CL Approved Lactose Intolerance Product.

Lactase Supplements Reviewed by ConsumerLab.com

Product Review

Ginkgo (Ginkgo Biloba) Supplements Review

Choose the Best Ginkgo Biloba Supplement. Finding Real Ginkgo Isn't Easy — 60% Fail ConsumerLab's Tests of Quality.

Ginkgo Biloba Supplements Tested by ConsumerLab.com

Product Review

Rhodiola Rosea Supplements Review

Do Rhodiola Supplements Help With Depression and Anxiety? Find Out and See Which Rhodiola Supplements Provide the Best Quality & Value.

Rhodiola Supplements Reviewed by ConsumerLab.com

Product Review

Iron Supplements Review (Iron Pills, Liquids and Chews)

See Which Iron Supplements Are CL's Top Picks for Different Needs

CL Answer

Are lozenges and sublingual pills considered dietary supplements?

Learn more about lozenges and sublingual pills (such as echinacea, zinc and B12) including safety warnings.

Person in Yellow Holding Blister Pack and Red Lozenge

CL Answer

Do any supplements help prevent or improve cataracts?

Find out which supplements may help with cataracts, including selenium and vitamins A, B1, B3, C, and E.

Doctor Shining Light for Patient Eye Exam

CL Answer

Is P-5-P really better than "regular" vitamin B6?

Learn more about pyridoxal-5-phosphate (P-5-P) and vitamin B6.

Man in Plaid Shirt Reading Supplement Bottle

News Release

April 26, 2019

Best Cholesterol-Lowering Supplements (Sterols, Stanols & Policosanol) Identified by ConsumerLab

White Plains, New York, April 26, 2019 — Plant sterols (also called phytosterols) and stanols, and, possibly, policosanol, can help lower elevated levels of cholesterol, a key risk factor for heart disease.

Product Review

Seaweed Snacks and Foods Review

Tests Reveal Seaweed Snack Risks

Product Review

Ashwagandha Supplements Review

Find the Best Ashwagandha Supplement. Only 56% of Ashwagandha Products Pass Tests.

Ashwagandha supplements reviewed by ConsumerLab.com

Product Review

Menopause Supplements Review (Soy and Red Clover Isoflavones, Black Cohosh) and Progesterone Creams

Choose the Best Menopause Supplement. Find Out Now Which Soy Isoflavone, Red Clover, Black Cohosh, and Progesterone Products Have the Active Compounds You Want!

Menopause Supplements Tested by ConsumerLab.com -- Soy and Red Clover Isoflavones, Black Cohosh, and Progesterone Cream

CL Answer

What are "broad-spectrum micronutrient" supplements, and do they have greater health benefits than multivitamin/multimineral supplements?

Learn about "broad-spectrum micronutrients" and how they compare to multivitamin/multimineral supplements.

Multivitamins on a table with a multivitamin supplement nutrition label in front of the multivitamins

Clinical Update

6/19/2019

NAD+ and Cancer?

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

Clinical Update

4/03/2018

What Niagen Does

Niagen (nicotinamide riboside) has been promoted as an anti-aging supplement. Find out what's been shown in clinical studies, including one published recently, in the Niacin section of the B Vitamin Supplements Review.

Clinical Update

9/21/2013

B Vitamin Supplements for Stroke?

A review of 14 clinical studies suggests that B vitamins may help prevent stroke. However, a deep reading of the report shows the benefit to be slight, at best.  For details about the study, other uses of B vitamins (including B6, B-12, folic acid, niacin and complexes), and tests of these supplements, see the B Vitamin Supplements Review>>  

Clinical Update

1/16/2024

Trigonelline?

Fenugreek contains trigonelline, a derivative of niacin. Find out what potential concerns, as well as health benefits, have been suggested for this compound in our article about fenugreek.

CL Answer

How do the Beyond Burger, the Impossible Burger, and a beef burger compare in terms of vitamins and minerals, and which is best?

Read our comparison of the Beyond Burger and the Impossible Burger, plant-based, meat alternative burgers. Compare nutrition, vitamins and minerals. ConsumerLab.com's answer explains.

Beyond Burger vs. Impossible Burger: Nutrition, Vitamins & Minerals -- cooked plant-based burger on bun

News Release

November 01, 2017

Gummies Are Most Likely to Fail Testing in Review of Multivitamins -- Best and Worst Multivitamins Identified by ConsumerLab Testing

White Plains, New York, November 1, 2017 — Multivitamin/multimineral supplements are among the most popular supplements, with many consumers relying on them to provide nutrients they may not get from their diets. However, ConsumerLab.

News Release

February 23, 2017

ConsumerLab.com Reveals Best and Worst B Vitamin Supplements and Why Current Labels Often Mislead

White Plains, New York, February 24, 2017 — B vitamins and complexes are popular supplements, but labels often mislead, says a new report from ConsumerLab.com which tested, reviewed, and compared 49 supplements from the U.S.

CL Answer

Are there any supplements I should avoid when taking acetaminophen (Tylenol)?

Find out if there are any supplements that should be avoided when taking acetaminophen (Tylenol).

Acetaminophen (Tylenol) Interactions With Supplements -- box of Tylenol

CL Answer

My doctor warned me that red yeast rice can cause liver damage - is that true?

Can red yeast rice cause liver damage? More information on its effects, including possible danger to the liver and kidneys.

Red Yeast Rice Tablets on White Background

CL Answer

Do any supplements, foods or lifestyle modifications help with brain function, like memory and cognition?

Find out which supplements help improve memory, brain function and cognition, including fish oil, some B vitamins, cocoa, and curcumin. ConsumerLab's answer explains the evidence for supplements promoted to help with brain function and cognition.

Supplements for Memory -- doctor holding a model of a brain and fish oil capsule

CL Answer

Which supplements reduce hearing loss?

Can supplements such as alpha-lipoic acid, magnesium, N-acetyl-cysteine, folate or vitamins B-12, C and/or E help prevent or improve symptoms among people with hearing loss due to excessive noise or aging? Find out what the clinical evidence shows, and learn whether Advanced Hearing Formula, a supplement marketed for ear health, is likely to help.

Older man holding his hand up to his ear due to hearing loss

CL Answer

What are the health benefits of nutritional yeast and is it safe?

Learn about the nutritional content and health benefits of nutritional yeast (nooch), evidence for or against nutritional yeast for boosting the immune system, lowering cholesterol and blood sugar, plus safety and side effects of nutritional yeast.

Nutritional Yeast

CL Answer

Pros and Cons of Stevia and Other Sugar Substitutes

Learn about the pros and cons of sugar substitutes and artificial sweeteners summarized in our table within this article.

Stevia Health Benefits & Safety -- stevia leaf spoonful of stevia

CL Answer

Is it better to take fish oil, flaxseed oil -- or both?

Fish oil and flaxseed oil -- how they are different, what they are used for, if and how they can help with arthritis, depression, lowering cholesterol & more.

Flaxseed Oil vs Fish Oil -- Omega-3 Supplements

CL Answer

I read an article stating that some of the ingredients in Centrum multivitamins may be dangerous or toxic. Is that true?

Learn more about the safety of ingredients in Centrum, including binders, fillers, and coloring agents.

Inactive Ingredients in Centrum -- Bottle of Centrum Vitamins

CL Answer

Is there a multivitamin that contains only the recommended daily vitamins and minerals? Most that I have looked at contain more.

Are there any multivitamins that contain only the recommended daily vitamins and minerals? Choose the best multivitamin based on age & gender.

Multivitamins with 100% Daily Requirements -- magnifying glass held over multivitamin pills

Recalls & Warnings

November 04, 2016

Energy Drink Linked to Case of Acute Hepatitis

A case of acute hepatitis has been linked to daily consumption of energy drinks, according to a report published on November 1, 2016, in BMJ Case Reports.

News Release

July 27, 2016

ConsumerLab.com Helps Consumers Make Sense of the FDA's Updated Daily Values (DV) for Vitamins and Minerals

White Plains, New York, July 27, 2016 — Daily Values (DV) for certain vitamins and minerals have been changed by the FDA, as part of the agency's revised rules for nutrient and supplement facts labeling. The changes went into effect on July 26, 2016.

News Release

January 12, 2016

Problems Found with 32% of Multivitamin/Multimineral Supplements -- ConsumerLab.com Identifies Good Choices for Men, Women, and Children

White Plains, New York, January 12, 2016 — You can't always judge a supplement by its label -- or by its price, according to a new report from ConsumerLab.com, which recently tested dozens of multivitamin/multimineral supplements.

News Release

July 22, 2014

Which Supplements Help Lower Cholesterol? ConsumerLab.com Identifies Best Products by Reviewing Evidence and Testing Quality

White Plains, New York, July 21, 2014 — Certain dietary supplements can help reduce elevated cholesterol levels. A new report from ConsumerLab.com reviews the evidence behind each of the popular cholesterol-lowering ingredients and provides test results for twelve supplements.

News Release

September 27, 2012

ConsumerLab.com Reveals How Much Caffeine is in Energy Drinks -- Also Finds Some Drinks and Dietary Supplements Don't Contain Claimed Amounts of B Vitamins

White Plains, New York — September 27, 2012 — Energy shots and drinks are promoted to keep you alert and energized, attributing their effects to special formulas often "packed with B vitamins and nutrients to make it last," as a commercial for 5-hour Energy proclaims.

News Release

October 26, 2010

ConsumerLab.com reports deficiencies in some B-complex supplements and more caffeine than expected in "shot-sized" B vitamin "energy" drinks

White Plains, New York — October 26, 2010 — Tests of B vitamin supplements, including B-complexes and shot-sized energy drinks, revealed problems with the quality of 4 out of 18 products selected for review by independent testing organization ConsumerLab.com.

Recalls & Warnings

December 01, 2020

Niagen Cannot Be Promoted to Prevent or Treat COVID-19, Warns FDA

On November 17, 2020, the FDA issued warning letters to the sellers of Niagen and Nadovim, supplements that contain different forms of niacin, for selling products with unsupported claims that they can treat coronavirus (COVID-19).

News Release

March 25, 2010

Cholesterol-lowering supplements reviewed by ConsumerLab.com: Many pass quality testing, one fails. Sterol and policosanol products analyzed. Evidence for other cholesterol-lowering ingredients evaluated

White Plains, New York — March 25, 2010 — Certain dietary supplements can help reduce elevated cholesterol levels. A new report from ConsumerLab.com reviews the evidence behind each of the popular cholesterol-lowering ingredients and provides test results for twelve supplement brands.

Recalls & Warnings

November 04, 2016

Liver Injuries Linked With Dietary Supplement Use on the Rise

The number of liver injuries associated with dietary supplement use has increased substantially in recent years, according to a recently published study in the journal Hepatology.

Recalls & Warnings

June 12, 2023

Children's Liquid Vitamin Supplement Recalled

On June 7, 2023, Procaps S.A. de C.V. issued a voluntary recall of various lots of Laboratorios Lopez’s Bacaolinita 8 fl. oz children's liquid vitamin supplement because it contains undeclared PEG-40 hydrogenated castor oil.

Recalls & Warnings

May 24, 2016

Seller of Joint Health, Omega-3 Supplements & More Warned for Manufacturing Violations, Drug Claims

On May 13, 2016, the FDA issued a warning letter to Rocky Fork Formulas, Inc.

Recalls & Warnings

September 01, 2022

Elite One Source Nutritional Services Warned for Manufacturing, Labeling Violations

On August 5, 2022, the FDA issued a warning letter to dietary supplement manufacturer Nutritional Laboratories International, Inc. (DBA Elite One Source Nutritional Services, Inc.

News Release

March 31, 2009

ConsumerLab.com Warns of Problems with Multivitamins and Vitamin Water -- Defects Found in Over 30% of Supplements Selected for Testing; Several Popular Children's Multis Exceed Tolerable Upper Intake Levels

WHITE PLAINS, NEW YORK — MARCH 31, 2009 — Over 30% of multivitamins recently selected for testing by ConsumerLab.com were found to contain significantly more or less ingredient than claimed or were contaminated with lead.

News Release

September 10, 2007

Tests of B-vitamins by ConsumerLab.com finds several short on folic acid — New report covers B-complexes, thiamin, niacin, B-6, B-12, biotin and folic acid supplements

WHITE PLAINS, NEW YORK — SEPTEMBER 10, 2007 — Half of the B-complex supplements recently selected by ConsumerLab.com for testing were found to lack the total claimed amounts of folic acid, an essential nutrient also known as vitamin B-9.

News Release

January 19, 2007

Consumers warned of problems with multivitamins — ConsumerLab.com uncovers defects in over half of products tested

WHITE PLAINS, NEW YORK — JANUARY 19, 2007 — Fifty-two percent of multivitamins recently selected for testing by ConsumerLab.com were found to be contaminated with lead, unable properly break apart, or to contain significantly more or less ingredient than claimed.

Recalls & Warnings

September 28, 2022

FDA Warns Muscle Sports for Joint Health, Immune & Workout Supplement, Vitamin C, Elderberry, and Other Claims

On September 23, 2022, the FDA issued a warning letter to Muscle Sports Products, LLC following inspection of the company’s websites which found statements about company products, including Join Revolution Capsules, IMMUNITY + Powder, Rhino Rampage PUMPED Capsules, Attack Pre-Workout ...

Recalls & Warnings

February 06, 2013

Vitamin and Supplement Maker Warned For Labeling Errors, Manufacturing Violations

On January 25, 2013, the FDA issued a warning letter to NX Generation Ltd.

Recalls & Warnings

April 04, 2013

Three More Sexual Enhancement Supplements Found To Contain Undeclared Drugs

On April 3, 2013, the FDA warned consumers that the sexual enhancement supplements AFFIRM XL, Love Rider and Ninja Mojo were found to contain undeclared erectile dysfunction drugs. Consumers are urged to stop using these supplements immediately.

News Release

August 01, 2006

ConsumerLab.com evaluates cholesterol-lowering supplements — Test results available for over 90 products; Review of nine popular ingredients

WHITE PLAINS, NY — AUGUST 1, 2006 — ConsumerLab.com has released a major new review of dietary supplements used to improve cholesterol and triglyceride levels.

News Release

March 30, 2005

ConsumerLab.com finds most B-vitamins of high quality but three lacking in ingredients — Test Results for 41 Products Reported Along with Information on Use

WHITE PLAINS, NY — MARCH 30, 2005 — ConsumerLab.com reported test results today for B vitamin supplements that it recently purchased in the U.S. and Canada.

News Release

May 21, 2004

Consumers warned of pitfalls with some multivitamins and vitamin waters — Testing by ConsumerLab.com uncovers problems with many brands

WHITE PLAINS, NY — FRIDAY MAY 21, 2004 — (Updated June 2, 2004) — ConsumerLab.com reported the results today of a major new analysis of popular multivitamin products.

News Release

July 31, 2003

ConsumerLab.com finds many cholesterol-lowering supplements poorly made — Test results published online today

WHITE PLAINS, NY — July 31, 2003 — ConsumerLab.com reported today that more than half of the cholesterol-lowering supplements that it recently purchased failed to contain their listed ingredients and/or could not adequately break apart to release their contents.

News Release

January 08, 2002

ConsumerLab.com finds most B vitamin supplements contain what they claim, but often exceed safe levels — Consumers cautioned to be aware of side effects with high dose products

WHITE PLAINS, NY — January 8, 2002 — ConsumerLab.com announced today that all but one of the twenty-one products analyzed in its B Vitamin Product Review contained the claimed amounts of B vitamins.

Recalls & Warnings

February 19, 2014

Seller of Sexual Enhancement Supplements Warned For Manufacturing Violations

On February 11, 2014, the FDA issued a warning letter to Maximus Niterider International Group, Inc.

News Release

February 14, 2001

Problems found with multivitamins and multiminerals by ConsumerLab.com

WHITE PLAINS, NY — February 14, 2001 — ConsumerLab.com announced today that only 14 of 27 products evaluated in its Multivitamin and Multimineral Product Review achieved full "CL Approved Quality" status.

Recalls & Warnings

March 01, 2013

Manufacturer of Joint, Weight Loss, Muscle Supplements and More Warned for Adulteration, Misbranding and Drug Claims

On February 4, 2013, the FDA issued a warning letter to DC Nutrition, Inc.

Recalls & Warnings

April 29, 2014

Seller of B Vitamins, CoQ10, Amino Acids and Other Supplements Warned for Manufacturing Violations and Drug Claims

On April 1, 2014, the FDA issued a warning letter to Bio-Recovery, Inc.

Recalls & Warnings

November 06, 2014

Seller of Cholesterol, Arthritis Supplements and More Warned for Drug Claims

On October 17, 2014, the FDA issued a warning letter to Vitamins Direct (USA) and Golden Pride, Inc., which distribute Flexezy and Physician's Signature brands of dietary supplements, following a facility inspection which found statements made about certain supplements to be drug claims.

Recalls & Warnings

May 14, 2014

Maker of Mood, Smoking Cessation Supplements and More Warned for Violations, Drug Claims

On April 17, 2014, the FDA issued a warning letter to CDJ Holding, Incorporated, d.b.a.

Recalls & Warnings

January 16, 2018

Adverse Effects From Energy Drinks Common Among Youth and Young Adults

More than half (55.4%) of young people who have ever consumed an energy drink have experienced at least one adverse reaction, according to study published yesterday in CMAJ Open, a journal of the Canadian Medical Association.

Recalls & Warnings

February 15, 2013

Energy Drink Recalled Due To Bacterial Contamination

On December 21, 2012, NBTY issued a voluntary recall of the energy supplement MET-Rx Extreme Thermo Rage Watermelon 8 fl. oz. (Manufactured by MET-Rx Nutrition, Inc.) due to bacterial contamination.

Recalls & Warnings

August 28, 2013

Maker of Sexual Enhancement Supplement Warned for Manufacturing Violations

On July 11, 2013, the FDA issued a warning letter to Precise Nutrition International Inc.

Recalls & Warnings

October 22, 2010

Enzyte "Male" Supplement Found to Affect Heart

The journal Archives of Internal Medicine (August 2010) includes a report of a small clinical trial of the dietary supplement Enzyte, which is marketed for "male enhancement."

Recalls & Warnings

December 05, 2015

FDA Warns Companies Selling Products Containing Picamilon

On November 30, 2015, the FDA issued warning letters to five supplement companies selling products containing picamilon, which is not a lawful dietary supplement ingredient in the U.S.

Recalls & Warnings

February 13, 2018

American College of Sports Medicine Warns of Energy Drink Dangers

A new statement released by the American College of Sports Medicine (ACSM) highlights the dangers of energy drinks when consumed by children and adolescents, and calls for more studies on the safety and efficacy energy drinks.

Recalls & Warnings

April 04, 2017

Seller of B Vitamins, Vitamin C, Potassium & More Warned for Manufacturing Violations

On March 24, 2017 the FDA issued a warning letter to The Sanapac Company, Inc.

Recalls & Warnings

January 17, 2017

Seller of Heart, Senior and Teen Supplements Warned For Drug Claims

On December 7, 2016, the FDA issued a warning letter to Esteem Products Ltd following a review of the company's website, which found statements made about its products, Cardio Life, Total Man, Total Woman, Senior Total Man, Senior Total Woman , and Total Teen to be drug ...

Recalls & Warnings

October 27, 2004

Some Supplements Can Damage Eyes At High Doses and with Topical Use

As reported by Reuters Health on October 21, 2004, an article in the current issue of the American Journal of Ophthalmology suggests that some herbal remedies and nutritional supplements can damage the eyes.

Recalls & Warnings

May 10, 2013

Seller Of Sexual Enhancement and Hormonal Balance Supplements Warned For Manufacturing Violations

On April 26, 2013, the FDA issued a warning letter to Pristine Bay, L.L.C.

Recalls & Warnings

April 18, 2013

Cardio, Energy and Sexual Enhancement Supplement Distributor Warned For Manufacturing Violations and Drug Claims

On December 21, 2012, the FDA issued a warning letter to ForMor Inc, dba ForMor International, following a facility inspection which found the company's Cardio Cocktail and Argenix dietary supplements to be adulterated because because they were prepared, packed, or held under conditions that do ...

Recalls & Warnings

September 05, 2014

Seller of "Nerve", "Cleanse" and Probiotic Supplements Warned for Drug Claims

On July 30, 2014, the FDA issued a warning letter to Plexus Worldwide, Inc., following a review of the company's website and product labels, which found statements made about Fast Relief, BioCleanse and ProBio5 to be drug claims.

Recalls & Warnings

October 28, 2015

GNC Accused of Selling Supplements with Unlawful Ingredients

On October 22, 2015, Oregon Attorney General Ellen Rosenblum filed a lawsuit against supplement retailer GNC, alleging that the company sold products that were adulterated with BMPEA and picamilon, which are not lawful dietary supplement ingredients.

Recalls & Warnings

December 26, 2017

Seller of BrainAlert Warned for Manufacturing Violations, Drug Claims

On December 14, 2017, the FDA issued a warning letter to BrainAlert, LLC.

Recalls & Warnings

December 26, 2012

Seller of Blood Sugar, Depression and Sleep Supplements Warned For Making Drug Claims

On October 15, 2012, the FDA issued a warning letter to BioNeurix Corporation after statements found on the company's website, http://www.pharma-tree.com, were found to promote the dietary supplements Blood Sugar 360, Amoryn, Seredyn, and Mellodyn as drugs.