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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.
Product Review
Vitamin A Supplements Review, Including Beta-Carotene and Cod Liver Oil
Find the Best Vitamin A Supplement. Best Quality Vitamin A Supplements Identified, Including Cod Liver Oil.
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.
Product Review
Probiotic Supplements Review (Including Pet Probiotics)
Probiotics: See What They Really Contain and Our Top Picks
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.
Product Review
Vitamin D Supplements Review (Including Calcium, Magnesium, Boron, and Vitamin K)
Find the Best Vitamin D Supplement with the Right Dose
Clinical Update
9/03/2019
Curcumin and Crohn's Disease
Can curcumin help prevent recurrence in people with Crohn's disease? See what a recent study found, plus the evidence for curcumin in other conditions, in the What It Does section of the Turmeric and Curcumin Supplements and Spices Review. Also see our Top Picks for turmeric and curcumin supplements and spices.
Clinical Update
6/09/2020
Probiotics That Do or Don't Work
An expert panel of gastroenterologists reviewed the clinical evidence for probiotics in preventing or treating C. difficile infection, IBS, ulcerative colitis, Crohn's disease, pouchitis, and necrotizing enterocolitis. Find out for which conditions they recommend probiotics and for which they don't in the What They Do section of the Probiotic Supplements Review (we've highlighted their recommendations in yellow). Also see our Top Picks for probiotics.
Product Review
B Vitamin Supplements Review (B Complexes, B6, B12, Biotin, Folate, Niacin, Riboflavin & More)
See Which B Vitamins Are ConsumerLab's Top Picks!
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.
Clinical Update
10/28/2022
Zinc Deficiency & Bowel Disease
A recent study showed zinc deficiency to be extremely common among people with Crohn’s disease and ulcerative colitis (the most common forms of inflammatory bowel disease or IBD). Find out more and if zinc supplements may help in the Zinc deficiency section of our Zinc Supplements Review.
Learn more about supplements for Crohn's disease and ulcerative colitis.
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.
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.
Clinical Update
2/03/2021
Thiamin Deficiency from Bowel Disease
People with inflammatory bowel disease (such as Crohn’s or colitis) can develop thiamin (vitamin B-1) deficiency, which can lead to life-threatening brain injury, as noted in a recent review of 31 cases. Learn more about this and other causes of thiamin deficiency in the Thiamin section of our B Vitamin Supplements Review.
Product Review
Fish Oil, Krill Oil, and Algal Oil Omega-3 (DHA & EPA) Supplements Review
Find the Best Fish Oil & Compare to Prescription Omega-3 Drugs. See Our Top Picks Among Fish Oil & Other Omega-3 Supplements for Adults, Children and Pets.
Product Review
Bone Broth Review
Find the Best Bone Broth. Find Out How Much Collagen and Sodium Is Really In Popular Bone Broths.
Product Review
Melatonin Supplements Review
Find the Best Melatonin Supplements. Trouble Sleeping? See CL's Tests of Melatonin Supplements and Top Picks.
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
CL Answer
Which supplements can help treat anemia? Do any supplements cause a low red blood cell count?
Find out which vitamin and nutrient supplements can help prevent and treat anemia in people who are nutrient deficient and learn which supplements may cause low blood cell counts, especially when used in excess.
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.
Product Review
Selenium Supplements Review
Choose the Best Selenium Supplement. Find Out If You Need Selenium and Which Supplement Is Our Top Pick.
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.
Product Review
Vitamin E Supplements Review
Find the Best Vitamin E Supplement. Tests and Reviews of Popular Vitamin E Supplements & CL's Top Picks.
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!
Product Review
Vitamin K Supplements Review (Including Calcium, Magnesium, Boron, and Vitamin D)
Should You Take Vitamin K? Beware of Products That Don't Deliver.
Product Review
Iron Supplements Review (Iron Pills, Liquids and Chews)
See Which Iron Supplements Are CL's Top Picks for Different Needs
Product Review
Lion's Mane and Chaga Supplements Review
Read Labels Carefully -- Many Can Mislead
CL Answer
What is TUDCA (tauroursodeoxycholic acid)? Does it have any proven health benefits, and is it safe?
TUDCA information, including its potential health benefits, safety, possible interactions, and cost.
Product Review
CoQ10 and Ubiquinol Supplements Review
Find the Best CoQ10 and Ubiquinol Supplements and Learn What They Do
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
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.
CL Answer
What are trace minerals and do I need them?
Trace minerals include boron, chromium, copper, iodine, iron, manganese, molybdenum, nickel, zinc, and others. Find out what they do, how much of each trace mineral you should be getting, and who's most likely to be deficient in these minerals.
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.
News Release
8/31/2012
ConsumerLab.com tests selenium supplements -- Finds one with less than 25% of listed amount
White Plains, New York, August 31, 2012 — ConsumerLab.com announced results today of its Product Review of Selenium Supplements. Among the supplements selected by ConsumerLab.com for testing, one was found to contain only 23.
News Release
6/18/2012
What is "Natural" Vitamin E? It Depends On the Brand Selling It, Finds ConsumerLab.com -- New Review of Vitamin E Supplements, Oil and Cream, Including Tocopherols and Tocotrienols
White Plains, New York, June 18, 2012 — What is in a "natural" vitamin E supplement, cream, or oil? According to recent tests by independent evaluator, ConsumerLab.com, this depends completely on the brand selling it.
Recalls & Warnings
5/08/2021
Seller of Immune Bio Green Cell Warned by FDA
On March 30, 2021, the FDA issued a warning letter to Immune & Genetics Protocols, LLC following a review of the company's websites, which found statements made about the company's product Immune Bio Green Cell to be drug claims.
Recalls & Warnings
9/13/2013
Metagenics Warned For Misbranding of Medical Foods and Drug Claims
On August 13, 2013, the FDA issued a warning letter to Metagenics, Inc.
Recalls & Warnings
10/24/2012
Manufacturer of Green Tea, Vitamin E, Omega-3 and Cranberry Supplements Warned For Manufacturing Violations, Misbranding and Drug Claims
On October 16, 2012, the FDA issued a warning letter to dietary supplement manufacturer Advanced Nutritional Technology Inc.
Recalls & Warnings
3/16/2006
Garden of Life, Maker of Primal Defense, Settles FTC Charges
On March 9, 2006, The Federal Trade Commission (FTC) announced that an operation that marketed dietary supplements sold at Whole Foods Market, GNC, the Vitamin Shoppe, and on the Internet settled FTC charges that they made deceptive advertising claims about their supplements.
Recalls & Warnings
2/06/2015
Seller of Aloe Supplement Warned for Drug Claims
On January 21, 2015, the FDA issued a warning letter to Pristine Nutraceuticals, LLC, following a review of the company's website, http://www.digestaqure.com, which found statements made about DigestaCure to be drug claims.
Recalls & Warnings
7/01/2015
Undeclared Drugs Found In Male Enhancement Supplements
On June 10, 2015, the FDA issued a warning letter American Lifestyle, following tests which found the company's sexual enhancement supplements Vicerex and Sudibil-Xr to contain the undeclared drugs propoxyphenyl thioaildenafil and tadalafil.
Recalls & Warnings
8/26/2014
Seller of Immune Supplement Warned for Drug Claims
On August 12, 2014, the FDA issued a warning letter to Ad-Med Biotechnology, following a review of the company's websites and product labels, which found statements made about Immune Active Adult Formula and Immune Active Children's Formula to be drug claims.
Recalls & Warnings
12/16/2015
Maker of Red Yeast Rice, St. John's Wort, Valerian and More Warned for Manufacturing Violations, Drug Claims
On December 2, 2015, the FDA issued a warning letter to Nature's Health, LLC, following a facility inspection which found the company's product, including Ginkgo & Rhodiola, Blood Sugar Balance IV, Cinnamon Extract, Choles-Balance Red Yeast Extract, Lecithin, Milk Thistle Seed Extract, ...
