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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 (Energy, Fiber, Meal Replacement, Protein, and Whole Food Bars)

Product Review

Psyllium Fiber Supplements Review

Most Psyllium Supplements Failed Our Tests Due to Lead Contamination. Find Out Which Passed or Failed and Which Is Our Top Pick.

Psyllium Supplements Reviewed by

Product Review

Prebiotic Supplements Review

You Can't Tell How Much Fiber Is Really In Most Prebiotics Without Testing

Product Review

Protein Powders, Shakes, and Meal Replacements Review

Find Out Which Protein Products Passed or Failed Our Tests

Product Review

Dark Chocolates, Cocoa & Cacao Powders, Nibs, and Supplements Review -- Sources of Flavanols

Is Your Chocolate or Cocoa Healthful or Toxic? Find the Best Dark Chocolate, Cocoa Powder and Cocoa Supplements Based On Our Tests.

Product Review

Whole, Ground, Milled, and Cracker Flaxseed Review

High Levels of Cadmium Found in Flaxseed Products – Testing Expanded

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

Product Review

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

Fruit and Veggie Supplements -- Find Out If They Are Worthwhile and See Our Test Findings

Product Review

Meal Replacement & Weight Management Powders and Shakes Review

Find the Best Meal Replacement and Weight Management Products. Only 64% of Meal Powders & Shakes Pass's Tests of Quality.

Meal Replacement Supplements Reviewed by

Product Review

Plant-Based Milks Review (Almond, Cashew, Coconut, Flax, Hemp, Macadamia, Oat, Pea, and Soy)

Find the Best Non-Dairy Milk Alternative. ConsumerLab Tests Reveal What's Really In Plant-Based Milks.

Plant Based Milks reviewed by

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

Product Review

Seaweed Snacks and Foods Review

Tests Reveal Seaweed Snack Risks

Product Review

Olive Leaf Extract Supplements Review

Learn What Olive Leaf Does and the Best Brands

Product Review

Electrolytes & Sports Drinks Review

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

Product Review

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

Product Review

Lion's Mane and Chaga Supplements Review

Read Labels Carefully -- Many Can Mislead

Lion's Mane and Chaga Supplements tested by

CL Answer

What is Skinny Fiber and does it really work? I see that glucomannan is a key ingredient. What is that?

Learn more about Skinny Fiber, including its key ingredient glucomannan, evidence from clinical studies, dosage info, and safety.

Skinny Fiber

Product Review

Lavender and Tea Tree Essential Oils Review

Oils Tested for Authenticity and Purity

CL Answer

Which supplements and foods can help lower or control blood sugar?

Find out which supplements can help lower or control blood sugar. Supplements including turmeric/curcumin, fiber, cinnamon, and ginseng are believed to help lower blood sugar.

Blood Sugar Control -- blood test and blood sugar chart

CL Answer

Which supplements and foods help relieve constipation and which can cause constipation?

Find out which supplements can cause constipation, including iron, calcium, protein powders and drinks and others.'s answer explains.

Which supplements can cause constipation? -- Woman with gastrointestinal pain

Product Review

Baobab Dried Fruit Pulp Review Article

What Are the Benefits of Baobab Dried Fruit Pulp? Find Out What's In Baobab Super Fruit Products, Safety, Side Effects & More.

Baobab Dried Fruit Pulp Reviewed by

Product Review

Probiotic Supplements Review (Including Pet Probiotics)

Probiotics: See What They Really Contain and Our Top Picks

CL Answer

Are Balance of Nature products good dietary supplements?

Do Balance of Nature supplements "Fruits" and "Veggies" supplements really provide the daily recommended servings of fruits and vegetables, and are they worth the cost? Find out.

Balance of Nature

CL Answer

Can psyllium help control hunger and appetite?

Learn more about psyllium (found in Metamucil), including effects on appetite and hunger control, results from clinical studies and safety.


CL Answer

Do any supplements naturally suppress appetite and help with weight loss?

Learn which natural ingredients can suppress appetite and find if these natural appetite suppressants help with weight loss.

Container of natural appetite suppressant supplement with measuring tape and scale in background

CL Answer

Which vitamins and minerals should be taken together or separately?

Find out the best way to take vitamins and minerals and which vitamins and minerals should be taken together or separately for proper absorption. ConsumerLab answer explains the best way to take vitamins and minerals.

Vitamins & Minerals That Should Be Taken Together or Separately -- various vitamins in spoons

Product Review

Cranberry Juices and Supplements Review

CL's Tests Show Which Cranberry Juices and Supplements Are Best and Cost the Least

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

Does taking a laxative interfere with the absorption of vitamins or minerals?

Information on laxative interactions with other medications and supplements such as Maalox, antibiotics, and statins and diabetes medications.

Laxatives and vitamin and mineral absorption

Product Review

Multivitamin and Multimineral Supplements Review

Best Multivitamins In 2023 -- Caution with Gummies

Product Review

Aloe Juices, Gels, and Supplements Review

How Much Aloe is Really in Aloe Products? Find Out and See Our Top Picks.

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.

CL Answer

Which supplements help reduce the risk of colorectal cancer?

Find out which supplements may reduce the risk of colorectal cancer, including folate, fiber, selenium, and vitamin D.

Supplements and Colorectal Cancer Risk -- colon cancer diagnosis form and supplements

Product Review

Bone Broth Review

Find the Best Bone Broth. Find Out How Much Collagen and Sodium Is Really In Popular Bone Broths.

Bone Broth Supplements Reviewed by

CL Answer

Are gummy vitamins better or worse than pills?

Learn more about gummy supplements, including those for multivitamins, vitamins C and D, calcium, and B vitamins.

Problems With Gummy Vitamins -- bottle of gummy vitamins

CL Answer

PFAS (Per- and Polyfluoroalkyl Substances): How can I avoid PFAS in dental floss, food, water, and other products?

Some brands of dental floss, including Oral-B Glide, may contain potentially toxic chemicals known as PFAS (polyfluoroalkyl substances), according to one study. Get the details in ConsumerLab's answer.

Toxic PFAS Chemicals in Dental Floss -- Woman Looking at Dental Floss

CL Answer

Does yacon syrup decrease appetite or help with weight loss? How do I find a quality brand?

Can yacon syrup can help with weight loss? Learn more, including clinical evidence, side effects, and dosage.

Yacon syrup for weight loss?

CL Answer

Are there supplements I should take, or take differently, when intermittent fasting?

Supplements that may help when intermittent fasting. Information about whey protein, CoQ10, magnesium and others, plus coffee, fiber and more.

Product Review

CoQ10 and Ubiquinol Supplements Review

Find the Best CoQ10 and Ubiquinol Supplements and Learn What They Do

CoQ10 and Ubiquinol Supplements Reviewed by

Clinical Update


Fiber Benefits

Higher fiber intake was associated with a lower risk of many major diseases in a recent study. However, the average American consumes far below the recommended daily intake of fiber. As oats are a good source of fiber, we’ve added details from the new study in the "Benefits" section of the Oat Cereals Review. (Also see our Top Picks oat cereals.)

CL Answer

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.

Four masks shown for comparison

CL Answer

Which supplements can cause diarrhea?

Can supplements like magnesium cause diarrhea? Find out which supplements may cause diarrhea, such as vitamin B12, curcumin, magnesium, vitamin C and fish oil.

Which supplements can cause diarrhea? -- Woman with gastrointestinal pain

CL Answer

I enjoy oat milk in my coffee, but how healthy is it for me?

Is oat milk healthy? Information about oat milk contents, how much sugar and calcium is in oat milk, and if it is a healthy alternative to cow milk.

Is oatmeal milk healthy? -- glass of oatmeal milk and oats in a spoon

News Release


High Levels of Cadmium Found In Whole and Ground Flaxseed In ConsumerLab Tests

White Plains, New York, January 12, 2023 — Recent ConsumerLab tests revealed concerning levels of cadmium, a toxic heavy metal, in several popular flaxseed products which, otherwise, provided the listed amounts of healthy fats, fiber, and protein without microbial contamination.

Product Review

Acai Berry Supplements and Beverages Review

Find the Best Acia Berry Supplements and Beverages. See Which Acai Berry Supplements and Beverages Passed Our Tests of Quality.

Acai berry supplements and beverages reviewed by

CL Answer

Does Restore (Bionic Sciences LLC) really improve gut health? What is in Restore?

Learn more about Restore, including clinical studies on gut health, dosage, cost, and safety.

CL Answer

What are the benefits of Daily Synbiotic by Seed Health? Does it do what it claims, and is it better than other probiotics and prebiotics?

Review of Daily Synbiotic by Seed, including information about the prebiotic and probiotic strains in the supplement, and whether there is evidence of benefit for the synbiotic.

Person pouring Daily Synbiotic capsules from container into other hand

CL Answer

Do any supplements or lifestyle changes reduce the symptoms of tinnitus? Is it true that some supplements can cause tinnitus?

Learn which supplements can ease tinnitus, including melatonin and pine bark extract. Understand which may actually cause tinnitus.

Word blocks spelling out “tinnitus”

Product Review

Choline and Lecithin Supplements Review (Including Phosphatidylcholine, CDP-Choline, and Alpha-GPC)

CL Answer

I am curious why some probiotics do not require refrigeration even though they contain some of the same bacteria in probiotics that require refrigeration? Which probiotics need to be refrigerated?

Refrigerating certain probiotic pills and other probiotic supplements is important. Get tips on how to store probiotics properly.

Do probiotic pills require refrigeration? -- Probiotic supplement

CL Answer

Do water filters remove microplastics from tap water?

Find out if water filter pitchers and faucet mounted filters from Brita, Pur, Lifestraw and other brands remove microplastics from tap water.

Water Filters for Microplastics -- water filter pitcher pouring water into glass

CL Answer

Which supplements help reduce flatulence (gas), and are there any that make it worse?

Find out which supplements may help reduce flatulence (gas), and learn which supplements or foods may worsen symptoms of flatulence.

Older woman sitting on her bed and holding her stomach due to gas and bloating

Product Review

Alginate Supplements Review (For Reflux)

See Our Top Pick Alginate Supplements For Reducing Symptoms of Gastroesophageal Reflux (GERD)

Alginate supplements reviewed by

News Release


Best Probiotic Supplements Identified by ConsumerLab Tests

  White Plains, New York, November 10, 2022 — Probiotic supplements can be helpful in preventing or treating constipation, diarrhea, flatulence, vaginal infections, and other conditions, but with so many different products on the market, choosing the best one is no easy task.

CL Answer

Does the talc added to Centrum Silver and other vitamins pose a risk of cancer?

Find out if talc, an inactive ingredient in many vitamins and supplements, is safe to consume, and learn about asbestos in talc and cancer risk and USP-grade talc vs. food-grade talc and cosmetics-grade talc.'s answer explains.

Talc in Vitamins & Cancer Risk -- broken white tablet

CL Answer

Is it true that eating Brazil nuts can help with weight loss? Are there other health benefits or risks of Brazil nuts

Learn more about vitamin E intake from nuts, including Brazil nuts, hazelnuts, and almonds.

Clinical Update


Cereal Fiber Reduces Risk of Death from Colorectal Cancer

Higher intakes of dietary fiber are associated with a lower risk of colorectal cancer. A new study suggests that higher intakes of fiber from cereal may reduce the risk of dying among those who have the disease. How much is needed for a benefit? Get the details in the "What It Does" section of the Oat Cereals Review >> [Also see our Top Picks for oat cereals in the Review.]

Clinical Update


Fiber Gummies?

Are fiber gummies a good way to get fiber? Find out in our updated answer to the question: Is there cause for concern with gummy vitamins?

Product Review

Joint Health Supplements Review (Glucosamine, Chondroitin, MSM, Boswellia, Collagen and Turmeric)

One-Third of Joint Health Supplements Failed to Pass Our Tests. See Which Passed or Failed, and our Top Picks.

Review of Supplements for Joint Pain

CL Answer

Can a probiotic help men with prostatitis?

Learn more about prostatitis, the effects of probiotics on prostatitis, and other natural treatments.

Recalls & Warnings


Benefiber Prebiotic Fiber Supplements Recalled Due to Possible Plastic Contamination

On April 28, 2020, GSK Consumer Healthcare recalled one lot of Benefiber Healthy Shape Prebiotic Fiber Supplement powder and four lots of Benefiber Prebiotic Fiber Supplement powder because they have the potential to be contaminated with green plastic pieces or shavings from 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

Product Review

Green Tea Review: Tea Bags, Loose Tea, Matcha Powders, and Supplements

Disturbing Findings for Some Major Brands of Green Tea. See the Test Results and Our Top Picks for Green Tea.

Green Tea Review By

Product Review

Coconut Oil and Medium Chain Triglycerides (MCT) Oil Review – Semi-Solid and Liquid Oils & Supplements

Find the Best Coconut Oil and MCT Oil. See How These Oils Compare on Medium Chain Triglycerides (MCTs), Quality, and Value.

Coconut and MCT Oils Reviewed by

CL Answer

Do any supplements help for ulcerative colitis?

Find out what supplements & vitamins can help with ulcerative colitis, such as VSL#3, curcumin, aloe or boswellia.

Woman Grabbing Stomach Due To Abdominal Discomfort

Product Review

Digestive Enzyme Supplements Review

Big Differences in Strength Found Among Digestive Enzyme Supplements. CL Tests Reveal Which Are Best.

Product Review

Turmeric and Curcumin Supplements and Spices Review

Find the Best Turmeric and Curcumin Supplements & Spices. Big Differences Discovered Among Brands -- Little Curcumin In Some.

Turmeric and Curcumin Supplements and Spices Reviewed by

Product Review

African Mango (Seed Extract) Supplements for Weight Loss Review Article

Do African Mango Supplements Really Work For Weight Loss? Learn More About Choosing the Best African Mango Supplement: Evidence, Safety, Side Effects & More.

African Mango Seed Extract

CL Answer

What is the difference between cocoa and cacao? Is one better than the other?

Learn about the difference between cocoa vs. cacao, including cocoa powder, cocoa extracts, cocoa liquor, and cacao nibs. Information about benefits, caffeine, theobromine in cocoa and cacoa, differences between dark chocolate and milk chocolate.'s answer explains.

CL Answer

Is Modified Citrus Pectin (MCP) helpful for prostate or breast cancer?

Modified Citrus Pectin (MCP) information including its effects on cancer, such as prostate cancer, and more.

Modified Citrus Pectin for Cancer? -- close up of an orange and orange peel

CL Answer

What is EpiCor? Does it really "boost" the immune system and prevent colds?

EpiCor supplement info, including evidence from clinical studies on immune function and cold/flu prevention, safety, and price.

Woman with Cold Holding Pill Bottle

CL Answer

How can I find supplements that are gluten-free on

Gluten-Free supplements & vitamin information including other dietary features like vegetarian, vegan, and kosher on Our answer explains.

Finding Gluten-Free Supplements -- gluten-free seal

CL Answer

Is there a danger in taking lecithin or phosphatidylcholine? I heard that they may increase the risk of heart attacks.

Lecithin, phosphatidylcholine and choline - Learn more about the potential link between them and cardiovascular disease.

Increased Heart Risk

CL Answer

What is lunasin and does it really reduce cholesterol?

Lunasin supplement information, whether lunasin can lower cholesterol, safety and side effects, foods that contain lunasin, like soy.

CL Answer

How does Athletic Greens’ AG1 compare to multivitamins and Greens powders? Is AG1 worth it?

ConsumerLab reviews the ingredients in AG1, its safety and possible side effects, and how AG1 compares to other products.

A pouch of AG1 on white background

Clinical Update



A CL Member recently asked us how ColonBroom, which is heavily promoted, compares to other psyllium fiber supplements. Find out in our Psyllium Fiber Supplements Review.

Clinical Update


Best Fiber Supplement for Constipation?

Which type of fiber supplement is best for treating mild, chronic constipation? See what experts recommend, and why, in the What It Does section of our Psyllium Supplements Review.

Product Review

Coconut Waters Review

Best Coconut Water? See Our Tests and Comparisons of Popular Brands Looking at Sugar, Electrolytes, Taste and Price.

Coconut Waters Reviewed by

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

Product Review

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)

Choose the Best Seed Oil Supplements. Find Out Which Flaxseed and Other Seed Oil Supplements Passed Our Tests.

Flaxseed Oil, Evening Primrose Oil, Borage Oil, Hemp Oil and Black Currant Oil Supplements Reviewed by

Product Review

Ginger Supplements, Chews & Spices Review

Tests Reveal Best and Worst Ginger Supplements & Spices. Poor Quality and Lead Contamination Discovered in Some Products.

Ginger Supplements Reviewed By

Product Review

Weight Loss Supplements Review (7-Keto DHEA, Forskolin and Stimulant Blend Supplements)

Choose the Best Weight Loss Supplement. Be Careful With Weight Loss Supplements — Few Pass Quality Testing and Safety Review.

Weight Loss Supplements Tested by

CL Answer

Butyrate Supplements for Gut Health: Does butyric acid really work and is it safe?

Can butyrate supplements improve gut health or help reduce symptoms of irritable bowel syndrome (IBS) or Crohn's disease? Find out what the clinical evidence shows, learn about the different forms of butyrate, including sodium butyrate, calcium-magnesium butyrate, and tributyrate, and get details about products such as BodyBio Sodium Butyrate and Healus Complete Biotic Tributyrin, dosage, safety and cost.

Butyrate Supplements

CL Answer

I have type 2 diabetes. Should I be concerned about ingredients like maltodextrin and maltitol that are found in some protein bars and drinks?

Learn more about maltitol and maltodextrin and their effects on blood glucose levels for people with type 2 diabetes.

Protein Bars and Powder

CL Answer

Which supplements can help with arthritis?

Learn more about collagen supplements for joint health, including evidence from clinical studies on arthritis and muscle strength and safety.

Supplements for Osteoarthritis and Rheumatoid Arthritis -- Women With Arthritic Hands

CL Answer

I'm interested in using Himalayan salt. What are the health benefits with it and other specialty salts? Are there contaminants in these salts?

Himalayan salt health benefits, along with other gourmet salts like Hawaiian and Mediterranean. Info including what's in them and their safety.

Himalayan Salt -- spoonful of pink Himalayan salt

CL Answer

Is it true that there is no point in taking fish oil supplements for heart health?

Taking fish oil for heart health may be a benefit. Learn more about omega fatty acids from fish oil and it's impacts.ains.

Fish Oil for Heart Health? -- fish oil capsules and stethoscope

CL Answer

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.

Lemon with Peel Coming Off

Clinical Update


Protein Shake for Weight Management?

Can drinking a protein and fiber shake improve weight management in overweight people when used along with diet and exercise? Find out what a recent study found in the Weight management section of our Protein Supplements Review. Also see our Top Picks among protein powders, shakes and drinks.

Clinical Update


Psyllium for Uncontrolled Bowel Movements

Psyllium is commonly used as a laxative, but did you know it can also help people with uncontrolled bowel movements (fecal incontinence), as noted in recent, expert guidelines? Get the details in the What It Does section of our Psyllium Fiber Supplements Review. Also see our Top Picks among psyllium supplements.

Clinical Update


Kiwi for Constipation?

Can eating kiwifruit reduce constipation as well as psyllium fiber? Find out what a recent study showed in our updated answer to the question: Which supplements and foods help relieve constipation and which can cause constipation?

Clinical Update


Do Prebiotics Cause Liver Cancer?

Some CL readers expressed concern over recent headlines suggesting that prebiotic fiber may cause liver cancer. Learn if this should be of concern in the Concerns and Cautions section of our Prebiotics Review.

Clinical Update


Protein & Nutrition Bars -- Watch Out for Weight Gain

Protein and nutrition bars can be a convenient way to get protein, fiber, and other nutrients, but they can lead to weight gain according to a recent study. The details are in our Protein and Nutrition Bars Review.

Clinical Update


Lifestyle Changes for Tinnitus?

Find out if research supports the following lifestyle changes for reducing symptoms of tinnitus:

Clinical Update


Prebiotic Diet for Mood?

Did eating foods rich in prebiotic compounds improve mood in people with moderate psychological distress? See what a recent study showed in our Prebiotics Supplements Review.

Also find out which foods are high in prebiotic fiber.

Clinical Update


Chia for Obesity?

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.

Clinical Update


Psyllium: Viva Naturals

Concerned about lead found by ConsumerLab in psyllium supplements, a CL member asked Viva Naturals about the quality of its Organic Psyllium Husk Powder, which was not tested by ConsumerLab. Viva provided its quality specifications for the product. See how this compares to amounts of lead actually found in competing products in the Update to the Psyllium Fiber Supplements Review. Also see our Top Picks among psyllium supplements.

Product Review

Elderberry Supplements Review

Find the Best Elderberry Supplement. Tests and Reviews of Popular Elderberry Supplements & CL's Top Picks.

Elderberry Supplements Reviewed by

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)

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

CL Answer

Do any supplements or foods benefit people with Crohn's disease? Are there any supplements that should be avoided?

Find out the most common vitamin and mineral deficiencies in people with Crohn's disease, including iron, B6, B12, vitamin D, zinc and others, plus evidence for N-acetyl-glucosamine (NAG), fish oil, and curcumin.

Supplements for Crohn's Disease -- Crohn's Disease Written on Notepad, Pills

CL Answer

Do any supplements help for irritable bowel syndrome (IBS)?

IBS supplements may help reduce irritable bowel symptoms such as pain, diarrhea and constipation. Supplements include probiotics, melatonin, and flaxseed.

Supplements for IBS? -- Women With Stomach Pain

Product Review

Iron Supplements Review (Iron Pills, Liquids and Chews)

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

Product Review

Collagen Supplements Review

The Best Collagen Supplements for Wrinkles and Joints Revealed. Find Out If Collagen Really Works and Which Reviewed Products Are Best In Our Tests and Comparisons.

Collagen Supplements Reviewed By ConsumerLab

Product Review

Zinc Supplements and Lozenges Review

Find the Best Zinc Supplements and Lozenges. Have a Cold? See CL's Top Picks Among Zinc Supplements and Lozenges.

Zinc Supplements and Lozenges Reviewed by

News Release


Labels on Prebiotic Supplements Are Often Unreliable, Tests Show

  White Plains, New York, October 28, 2022 — Prebiotic supplements provide fiber that feed beneficial bacteria in the gut. However, recent ConsumerLab tests show that consumers often can’t rely on labels to know how much prebiotic fiber is really in products.

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.'s answer explains.

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

CL Answer

Do gluten-free diets increase your exposure to toxins like arsenic and mercury?

Find out if your gluten-free diet is increasing your exposure to toxic heavy metals like arsenic and mercury.

Woman with Freshly Baked Cookies

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

CL Answer

What are the side effects of red yeast rice?

Find out which side effects can be caused by red yeast rice supplements that are taken to lower cholesterol levels.'s answer explains.

Red Yeast Rice Side Effects -- red yeast rice capsules and tablets

CL Answer

Are enteric coated supplements better than non-enteric coated ones?

Learn about the pros and cons of enterically coated supplements, including ingredient absorption,safety and price.

Glass of Water and White Pill

Product Review

Noni Juice and Supplements Review Article

What Are the Benefits of Noni Juice? Get the Facts About Noni Juice and Supplements.

Product Review

CBD & Hemp Extract Supplements, Lotions, and Balms Review

Find the Best CBD at the Lowest Price! Learn How Much CBD (and THC) Is Really in Products and Which Are Our Top Picks.

CBD and Hemp Oils Reviewed by

Recalls & Warnings


Flaxseed Salmonella Risk Prompts Recall

Update: (2/4/20) This recall has been expanded to include additional Nopalina flaxseed products, which are highlighted below.

Product Review

Low-Dose Lithium Supplements Review

Choose the Best Low-Dose Lithium Supplement. CL Tests Reveal Which Low-Dose Lithium Supplements Offer the Best Quality and Value.

Very Low Lithium Supplements Reviewed by

CL Answer

Is it true that there are bits of plastic in drinking water and specialty salts? How concerned should I be?

Microplastics are tiny pieces of plastic that can end up foods and beverages. Learn about microplastics found in drinking water and specialty salts.'s answer explains.

Microplastics in water, plastic bottle of water pouring water into glass

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

News Release


Consumers Returned to Pre-Pandemic Supplement Usage in 2021, ConsumerLab Survey Reveals

White Plains, New York, February 24, 2022 —A survey of 8,049 people who use dietary supplements shows many supplements that declined in use in 2020 began bouncing back in 2021, such as magnesium (+2.4 percentage points), and CoQ10 (+2.7 pts).

Product Review

Alpha Lipoic Acid Supplements Review

Choose the Best Alpha-Lipoic Acid Supplement. Some Alpha-Lipoic Acid Supplements Cost 13 Times As Much As Others -- But Is It Worth Paying More?

Alpha-Lipoic Acid Supplements Reviewed by

Product Review

Garcinia Cambogia (HCA) Supplements Review

Find the Best Garcinia Cambogia Supplement. Choose Carefully! Most Garcinia (HCA) Weight Loss Supplements Lack Listed Amount of Ingredient .

Garcinia Cambogia (HCA) Supplements Reviewed by

Product Review

Maca Supplements Review

Choose the Best Maca Supplement. Make Sure Your Maca Supplement Isn't Contaminated With Lead.

Maca Supplements Reviewed by

Product Review

SAMe (S-adenosyl-methionine) Supplements Review

Choose the Best SAMe Supplement. CL Tests Reveal Big Differences in Quality and Cost.

Sam-e supplements reviewed by

Recalls & Warnings


Metal Reported in Church & Dwight Gummy Melatonin, Multis & Fiber Supplements

On April 20, 2021, Church & Dwight Co., Inc.

Recalls & Warnings


Protein and Fiber Bars Recalled Due to Allergen Risk

On January 28, 2021, think! and Interpac Technologies, Inc. issued a voluntary recall of think! Protein + Fiber Oatmeal: Farmer's Market Berry Crumble due to the potential presence of tree nuts, including almonds and pecans.

Product Review

Red Yeast Rice Supplements Review

50% of Red Yeast Rice Supplements "NOT APPROVED" in CL Tests

Product Review

Reishi Mushroom Supplements Review

Find the Best Reishi Mushroom Supplement. See How Reishi Supplements Differ.

Reishi Mushrooms tested by

Product Review

Apple Cider Vinegar Review – Bottled Liquids and Supplements

Find the Best Apple Cider Vinegar. See Which Apple Cider Vinegar Liquids and Supplements Passed Our Tests of Quality.

Apple Cider Vinegar Supplements Reviewed by

Product Review

Cinnamon Supplements and Spices Review

CAUTION: Some Cinnamon Products High in Toxin. See Which Passed or Failed and our Top Picks! .

Cinnamon Supplements and Spices Tested by

Product Review

Echinacea Supplements Review

Many Echinacea Supplements Fail CL's Tests. Make Sure You Know What You're Getting!

Echinacea supplements reviewed by

Product Review

Prostate Supplements Review (Saw Palmetto and Beta-Sitosterol)

Find the Best Prostate Supplement for Symptoms of BPH. See Which Prostate Supplement Passed or Failed CL's Tests of Quality.

CL Answer

7 Red Flags to Watch Out For When Buying Vitamins & Supplements

When it comes to buying vitamins and supplements, it's buyer beware. ConsumerLab explains seven red flags to look out for on labels when choosing and buying vitamins or supplements, including claims of "FDA Approved" laboratories, what to look for in the ingredient list, and more.

What to Watch Out for When Choosing a Supplement -- Supplement Bottle Label Close-up

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Do any supplements help prevent or treat a cold?

Are there supplements that can help prevent or treat cold symptoms? Learn more about zinc, probiotics, vitamin C and more.

Supplements for Colds: Zinc, Echinacea & More -- Couple with cold, sitting on couch blowing their noses

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What is acrylamide? Is it true that coffee and cocoa contain this toxin?

Find out what acrylamide is, how much is found in coffee and cocoa, and how you can minimize your intake of acrylamide.

Acrylamide in Coffee, French Fries & Cookies

News Release


Caution With Spirulina Supplements: ConsumerLab Tests Reveal Lead Contamination, Quality Concerns

White Plains, New York, February 9, 2022 — Problems were discovered in three out of four spirulina supplements recently tested by ConsumerLab. One product was found to be contaminated with lead, and two other products, which were tablets, failed to disintegrate within the expected time.

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I take levothyroxine (Synthroid), a thyroid hormone to treat hypothyroidism. Are there supplements or foods I should avoid, or be taking, due to this drug?

Is taking certain supplements and hypothyroidism medications bad? Learn which supplements can interact with thyroid hormone medications like levothyroxine (Synthroid), thyroid hormone levels, and laboratory tests.

Levothyroxine (Synthroid) Supplement Interactions

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7 Supplements That May Help Treat Peptic Ulcers – And Some to Avoid

Peptic ulcers caused by H. pylori infection are typically treated with antibiotics, but certain supplements may also help. Find out which 7 supplements might be beneficial - and which should be avoided.

Supplements for peptic ulcer disease - young man with stomachache

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Do any supplements help prevent or reduce eye floaters?

Find out eye floaters (vitreous floaters) be treated with supplements like vitamin C, lutein, ginkgo, milk thistle, collagen or hyaluronic acid, or with products such as VitreousHealth.

How to Reduce Eye Floaters With Vitamins & Supplements -- Close-up of an eye

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Are antioxidant supplements good or bad for you?

Learn more about whether antioxidants like astaxanthin, beta-carotene, coenzyme Q10, curcumin, resveratrol, selenium, vitamin A, vitamin C and vitamin E are safe and if they help prevent chronic diseases.

Can Antioxidants Cause You to Die Sooner? -- antioxidant supplements and carrots

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I read that turmeric may be a GI irritant. I have GI problems and wonder if I should avoid turmeric and curcumin?

Find out if turmeric/curcumin supplements can cause gastrointestinal irritability.

Is turmeric a stomach irritant? -- Turmeric Supplement

News Release


Dangerous Amounts of Iodine, Toxic Heavy Metals Found in Some Seaweed Snacks, According to ConsumerLab Tests

White Plains, New York, December 20, 2021 — Dried or roasted seaweed has become a popular snack, providing a tasy, crunchy, and vegan-friendly source of protein, fiber, and iodine, an essential nutrient for proper thyroid function.

Recalls & Warnings


Fiber Supplement Recalled for Salmonella Risk

On April 13, 2020, Break Ventures/California Basics issued a recall of one lot of Zero for Him fiber supplement because recent testing found it has the potential to be contaminated with Salmonella.

Product Review

Magnesium Supplements Review (Including Calcium, Boron, and Vitamins D & K)

Find Out What Magnesium Does, Who Needs It, and Our Top Picks Among Supplements

Recalls & Warnings


Men's Fiber Supplement Recalled

On January 21, 2018, Break Ventures/California Basics recalled of its fiber supplement for men, Zero for Him (150 count) due to possible Salmonella contamination.

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Which air purifiers are best for reducing the spread of COVID-19?

Find out if portable air cleaners can remove the virus that causes COVID-19 infection from the air and learn which type air cleaners work best.

HEPA air purifier on bedroom floor

Recalls & Warnings


Built Brand Protein Bar Recalled Due to E. Coli Concern

On June 10, 2022, Built Brands, LLC. Issued a recall of 4,146 Banana Cream Pie Puffs protein bars after routine testing discovered potential contamination with E. coli (Escherichia coli).

Recalls & Warnings


Prune & Senna Softgels Recalled Due to Undeclared Peanuts

On March 26, 2022, Indiana Botanic Gardens Inc. issued a voluntary recall of one lot of Botanic Choice brand Prune & Senna Softgels because the product contained undeclared peanuts.

News Release


Best and Worst Chia Seed Products Revealed by ConsumerLab

White Plains, New York, March 3, 2020 — Chia seeds are rich in fiber and a good source of healthful oils, particularly the omega-3 fatty acid ALA (alpha-linolenic acid), as well certain vitamins and minerals.

News Release


Some Nutrition Bars Contain More Carbs and Less Fiber Than Listed, ConsumerLab Tests Reveal

White Plains, New York, September 11, 2019 — Nutrition bars and cookies are promoted as a convenient way to get protein, fiber and other nutrients on-the-go, but recent ConsumerLab tests of popular nutrition bars and cookies reveal that some contain more carbohydrates (as well as fat and ...

News Release


Vitamin D Supplements Maintain Top Spot in Popularity, as Probiotics Surpass Multivitamins to #4 Behind Fish Oil and CoQ10 in Latest Survey

White Plains, New York, February 24, 2017 — A recent survey of over 9,505 people who use dietary supplements shows the most popular dietary supplement to be vitamin D, followed by fish oil, CoQ10, probiotics, and multivitamins.

News Release


36% of Meal Replacement Powders and Shakes Fail's Tests of Quality

White Plains, New York, July 26, 2016 — Nutritionally balanced powders and read-to-drink shakes can help people lose weight, improve blood sugar control, build muscle, and provide a healthful alternative to snacks. However, recent ConsumerLab.

News Release

10/08/2013 Reports Problems and “Top Picks” Among Bars for Energy, Fiber, Protein, Meal-Replacement, and Whole Food

WHITE PLAINS, NEW YORK — October 8, 2013 — Which nutrition bars provide the best combination of nutrition and taste, and are accurately labeled? recently set out to answer this question by purchasing popular bars in the U.S.

Recalls & Warnings


HI-TECH Workout Supplements Recalled Due to Undeclared Allergens

On April 3, 2021, HI-TECH Pharmaceuticals issued a recall of all lots of APS Nutrition Isomorph 28 in a 2lb jug because they contain undeclared milk, wheat, and soy.

Recalls & Warnings


Seller of Aloe, Prostate and Joint Supplements Warned for Manufacturing Violations

On April 8, 2016, the FDA issued a warning letter to Salud Natural Entrepreneurs, Inc.

Recalls & Warnings


Medifast Settles False Advertising Suit

On September 7, 2012, Jason Pharmaceuticals Inc., a wholly owned subsidiary of Medifast, agreed to pay a $3.7 million civil penalty and meet new compliance requirements as part of a settlement with the U.S. Department of Justice and the Federal Trade Commission.

News Release


Contamination a Common Problem in "Greens" and "Whole Foods" Products According to

White Plains, New York — July 8, 2013 — "Greens" and "whole foods" powders and pills, made from wheat grass, alfalfa, kelp, spirulina, leafy vegetables and other chlorophyll-containing ingredients, as well as fruits, were recently tested by ConsumerLab.

Recalls & Warnings


Company Warned For Distributing Weight Loss Supplement Containing DMAA, Drug Claims

On September 6, 2013, the FDA issued a warning letter to Pure Energy Products, Inc., following a facility inspection which found that the company distributes a weight loss supplement, called obestrim, which contains dimethylamylamine, or DMAA.

Recalls & Warnings


Weight-Loss Marketers Pay $3 Million for Deceptive Advertising

On May 11, the Federal Trade Commission (FTC) announced that sellers making questionable weight-loss and fat-loss claims to peddle skin gels and diet supplements will pay $3 million to settle charges that their deceptive claims violated federal law.

News Release

6/09/2010 tests "greens" and "whole foods" products; Most offer healthful nutrients, but some found contaminated with heavy metals

WHITE PLAINS, NEW YORK — JUNE 9, 2010 — "Greens" powders, made from wheat grass, alfalfa, kelp, spirulina, leafy vegetables and other chlorophyll-containing ingredients, were recently tested by for potential contamination with heavy metals and pesticides. ConsumerLab.

News Release


40% of Green Tea and Selenium Products Fail Review of Cancer-Prevention Supplements; Lycopene Supplements Pass

WHITE PLAINS, NEW YORK — APRIL 28, 2009 — announced results today of its Product Review of Supplements for Cancer Prevention.  Among the products that selected for testing, quality problems were found with two out of five green tea supplements.

News Release

8/12/2008 finds improvements in labeling of nutrition bars but potential pitfalls exist -- New report compares 20 bars, including those for protein, fiber, energy and whole food

WHITE PLAINS, NY — August 12, 2008 — Labeling on nutrition bars has become more accurate, according to a new report by

News Release


Pharmavite dietary supplements receive approval — Vitamin E, SAM-e, St. John's Wort, Ginkgo and others merit approved quality products ranking

WHITE PLAINS, NY — July 10, 2002 — ConsumerLab.

Recalls & Warnings


FTC Settles Claims with Marketers of FiberThin and Propolene

On June 20, 2005, the Federal Trade Commission (FTC) announced that the marketers of the dietary supplements FiberThin and Propolene have settled FTC charges that their misleading weight-loss claims violated federal laws.

Recalls & Warnings


FTC Challenges Deceptive Weight Loss Claims for Supplement Targeted at Hispanics

On June 17, 2004, the Federal Trade Commission (FTC) announced a new law enforcement action challenging false advertising for the 1-2-3 Diet Kit, a purported weight loss product.

Recalls & Warnings


FDA Reports Arsenic in Rice Products -- Particularly Brown Rice

On September 19, 2012, the U.S. FDA released results of its testing of nearly 200 samples of rice and rice products, finding appreciable levels in many products, although the amounts in only a few exceed the cancer-warning threshold of the State of California (10 mcg per daily serving).