Product Reviews and Information for Celiac

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CL Answer

How can I find supplements that are gluten-free on ConsumerLab.com?

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

Product Review

Rolled Oats and Steel-Cut Oats Review

Find the Best Rolled and Steel-Cut Oats -- Beware of Unexpected Gluten.

CL Answer

Supplements That May Be Needed When Following a Gluten-Free Diet

Find out if supplements such as folate, vitamin B-12, niacin, thiamin, iron, vitamin D, and/or fiber are needed when following a gluten-free diet. Also learn how to find gluten-free supplements on ConsumerLab.com.

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

Digestive Enzyme Supplements Review

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

CL Answer

Do any supplements help treat or reduce the pain of plantar fasciitis (heel pain)?

Plantar fasciitis causing heel pain has, in rare cases, been reported as a symptom of vitamin D deficiency. Other supplements that have been proposed to help include vitamin C, zinc, curcumin (from turmeric), bromelain, collagen and glucosamine. Find out what the evidence shows, and what other treatments may help.

Product Review

Nutrition Bars Review (Protein, Energy, and Nut & Fruit Bars)

Our Tests Showed What's Hiding in Protein Bars

CL Answer

Can supplements, natural eye drops, or lifestyle modifications improve symptoms of dry eye?

Can supplements such as fish oil, flaxseed oil or curcumin (from turmeric) help treat dry eyes? Find out, including formulas and doses that have shown benefit. Also, learn if drinking more water or using eye drops containing castor oil, N-acetylcarnosine or aloe can help with dry eye.

CL Answer

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.

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

CLA (Conjugated Linoleic Acid) Supplements Review (for Slimming)

Choose the Best CLA Supplement. Not All CLA Supplements Contain What You Expect.

Product Review

Gluten-Free Grains Review (Buckwheat, Quinoa, Sorghum, Millet, and Teff)

31% of Gluten-Free Grains Fail Our Tests Due to Contaminants. Quinoa, Buckwheat, Sorghum, Millet and Teff Tested.

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.

Product Review

Alpha-Lipoic Acid Supplements Review

Choose the Best Alpha-Lipoic Acid Supplement — See the Amounts of Active "R-Isomer" We Found

Product Review

SAMe (S-adenosyl-methionine) Supplements Review

Choose the Best SAMe Supplement and Save Money

CL Answer

Can any vitamins or minerals help prevent or reduce canker sores or cold sores?

Find out which, if any, supplements, including iron, L-lysine, monolaurin, olive leaf extract, vitamin B-12, and zinc, may be beneficial for canker sores or cold sores.

Product Review

DHEA Supplements Review

Choose the Best DHEA Supplement. Beware of Big Differences in Dose and Price.

Product Review

L-Lysine Supplements Review

Read L-Lysine Labels Carefully. Some Can Fool You.

Product Review

L-Arginine Supplements Review

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

Product Review

Chromium Supplements Review

Chromium Supplements Review. Best Chromium Supplements Identified -- By Strength.

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.

Product Review

Resveratrol Supplements Review (From Red Wine, Knotweed, and Other Sources)

See Which Resveratrol Supplements Were Best In Our Tests and Comparisons. Learn What Resveratrol Can and Can't Do.

Product Review

Ashwagandha Supplements Review

Find the Best Ashwagandha Supplement. Only 38% of Ashwagandha Products Pass Tests.

Product Review

L-Theanine Supplements Review

Touted for Stress Relief, Do L-Theanine Supplements Work?

Product Review

St. John's Wort Supplements Review

Find the Best St. John's Wort Supplement. Only 40% of St. John's Wort Supplements Pass Tests & Strength Varies Widely.

Product Review

Saffron Supplements Review

See How Saffron Supplements Compare and What They Do

Product Review

Protein Powders, Shakes, and Meal Replacements Review

Find Out Which Protein Products Passed or Failed Our Tests

Product Review

CoQ10 and Ubiquinol Supplements Review

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

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.

Product Review

NAC (N-Acetyl Cysteine) Supplements Review

Choose the Best N-Acetyl Cysteine Supplement. See Our Tests of Popular NAC Supplements and Top Picks for Quality and Value.

Product Review

Acetyl-L-Carnitine Supplements Review

Choose the Best Acetyl-L-Carnitine Supplement. Don't Overpay! CL Identifies Quality Acetyl-L-Carnitine Supplements at the Best Value.

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.

Product Review

Phosphatidylserine (PS) Supplements

Find out if phosphatidylserine helps with memory and which products are best.

Product Review

L-Glutamine Supplements Review

Find the Best L-Glutamine Supplements Based on Quality and Value. See our Top Picks.

CL Answer

What is the best sunscreen based on safety and efficacy?

We’ve boiled down the latest research about mineral and chemical sunscreens, including product tests, to help you choose the best sunscreen (which will depend on whether you expect to be in or out of the water). We also list popular sunscreens that have, or have not, been found to contain cancer-causing compounds (benzene and benzophenone).

Product Review

B Vitamin Supplements Review (B Complexes, B6, B12, Biotin, Folate, Niacin, Riboflavin & More)

See Our Top Picks and Which 5 Failed Testing

Product Review

Amla Supplements Review

Only 3 of 8 Amla Powders and Pills Pass CL's Tests

Product Review

Potassium Supplements Review

Be Careful with Potassium Supplements! Problems Found. Tests and Reviews of Potassium Supplements & CL's Top Picks.

Product Review

Nattokinase Supplements Review

Choose the Best Nattokinase Supplement. CL Tests Reveal Which Nattokinase Suppplements Provide the Best Quality & Value.

Product Review

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

Choose the Best Choline Supplement. Find Out How Much Choline Popular Supplements Really Provide.

Product Review

Glycine Supplements Review

Tests of Glycine Show High-Quality but Major Savings with Right Products.

Product Review

Zinc Supplements, Lozenges, and Melts Review

Find the Best Zinc Supplements, Including Lozenges for Colds.

Product Review

Astaxanthin Supplements Review

See Which Astaxanthin Products Passed or Failed CL's Tests

Product Review

Berberine and Goldenseal Supplements Review

Tests Reveal the Best and Worst Berberine and Goldenseal Products

Product Review

Lion's Mane and Chaga Supplements Review

Read Labels Carefully -- Many Can Mislead

Product Review

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

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

Product Review

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

18% of Joint Health Supplements Failed to Pass Our Tests. See Which Passed or Failed, and Our Top Picks.

Product Review

Black Currant, Borage, Evening Primrose, Flax and Hemp Oil Review

Choose the Best Flaxseed and Other Oils Based on Our Tests.

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.

Product Review

PQQ (Pyrroloquinoline Quinone) Supplements Review

Learn What PQQ Does and Which PQQ Supplements are Best

Product Review

Milk Thistle Supplements Review

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

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.

Product Review

Lycopene Supplements Review

Find the Best Lycopene Supplements. CL Tests Reveal That Not All Lycopene Supplements Contain What They Claim.

Product Review

Melatonin Supplements Review

Trouble Sleeping? See CL's Tests of Melatonin Supplements and Top Picks.

Product Review

Farro and Bulgur Review

See How Bob's Red Mill Compares to Trader Joe's

CL Answer

ConsumerLab’s Review of ION* Gut Support

ConsumerLab's Review of ION Gut Support (formerly Restore), the liquid humic extract supplement derived from soil. Learn about the evidence for ION Gut Support for on digestion and gut health, reducing inflammation, and other uses, dosage, cost, and safety.

CL Answer

What are "hypoallergenic" supplements? How can I find hypoallergenic supplements on ConsumerLab.com?

Hypoallergenic supplements are typically formulated without ingredients known to be common food allergens, such as milk, fish, shellfish, eggs and nuts, and/or gluten , and certain artificial coloring agents, and fillers. ConsumerLab has tested many hypoallergenic supplements including multivitamins, probiotics, protein powders and more.

CL Answer

Do diamine oxidase (DAO) supplements for histamine intolerance really work?

DAO supplement info for histamine intolerance, including diamine oxidase safety, evidence from clinical studies, and dosage.

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.

Recalls & Warnings

May 20, 2015

Gluten Found in More Than Half of Popular Probiotic Supplements Tested

Tests of 22 popular probiotic supplements revealed that 12 contained detectable amounts of gluten, according to researchers at the Celiac Disease Center at Columbia University Medical Center.

CL Answer

Can any supplements reverse gray hair?

Nearly 75% of adults aged 45 to 65 are affected by gray hair. Learn about what causes gray hair and find out if any supplements can help.

CL Answer

What are the side effects of ashwagandha supplements?

Learn about the safety and side effects of ashwagandha supplements, including headache, sleepiness, upset stomach, blood pressure and more. ConsumerLab.com's answer explains.

CL Answer

Does TA-65 Astragalus Extract Increase Telomere Length and Longevity?

TA-65 Astragalus Extract is promoted to increase telomere length. Find out if there is evidence for this, if this increases lifespan or longevity, plus safety, side effects and cost.

News Release

December 05, 2024

Some Oats Surprisingly High in Gluten, According to ConsumerLab Tests

White Plains, NY, December 5, 2024 —  Oats are a healthy source of fiber and naturally gluten-free. However, it’s not uncommon for oats to become contaminated with gluten during processing, which can cause problems for people with celiac disease and others who follow a gluten-free diet.

CL Answer

What are phytoceramides? Do phytoceramide supplements really work to improve aging skin?

Phytoceramide supplement information, including what they are, what they claim to do, and if they have anti-aging effects.

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.

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.

Recalls & Warnings

May 09, 2022

Natural Organics Keto Capsules Recalled Due to Gluten

On March 6, 2022, Natural Organics, Inc. issued a recall of four lots of NaturePlus Keto Living Sugar Control Capsules that were found to contain gluten.

News Release

September 11, 2019

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

January 31, 2019

Contamination Still an Issue in Some Greens and Whole Food Products, ConsumerLab Tests Reveal

White Plains, New York, January 31, 2019 — Powders and capsules containing ingredients such as wheat grass, spirulina, chlorella, and fruits and vegetables are a popular way to get vitamins, minerals and other plant-based nutrients, but past tests by ConsumerLab have found that these products ...

News Release

August 30, 2016

Surprising Results in Oat Cereals Study by ConsumerLab.com -- Popular Brands Tested for Fungal Toxin, Gluten and Heavy Metals

White Plains, New York, August 30, 2016 — Cheerios, rolled oats, steel-cut oats and other oat cereals can be a healthy choice for breakfast.

Recalls & Warnings

September 23, 2024

Lactaid Milk Recalled Due to Allergen

On September 20, 2024, HP Hood LLC voluntarily recalled five SKUs of refrigerated Lactaid Milk due to the product potentially containing trace amounts of almond, which is not declared on the label. No illness has been reported to date.

News Release

June 15, 2016

28% of Protein Powders and Drinks Fail ConsumerLab.com's Tests of Quality

White Plains, New York, June 15, 2016 — Protein powders and drinks can help build and maintain muscle when combined with exercise and can also help with blood sugar control. However, recent ConsumerLab.

News Release

November 06, 2015

Some Surprising Results from Tests of 43 Probiotic Supplements and Kefir Drinks

White Plains, New York, November 6, 2015 — How many beneficial organisms are in probiotic supplements and kefir drinks? Are any contaminated with pathogens, such as E. coli, and do those labeled as "gluten free" or "99% lactose-free" live up to their claims? To find out, ConsumerLab.

News Release

October 31, 2011

Supplements for lactose intolerance vary in strength and cost, and some offer no benefit, according to ConsumerLab.com

White Plains, New York — October 31, 2011 — Can lactose-free milks and lactase enzyme supplements provide help to the millions of Americans with lactose intolerance.

Recalls & Warnings

February 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

September 19, 2012

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).

Recalls & Warnings

October 07, 2011

Recall of Whey Protein Powders Due to Allergens

On October 6, 2010 the FDA posted a recall notice from Prolab Nutrition Inc. (dated September 30) indicating that some of its PROLAB protein powders are being recalled as they may contain undeclared milk, wheat and gluten allergens.

Recalls & Warnings

July 11, 2017

Gluten Free Chocolate Chip Bars Recalled Due to Allergen Risk

On July 10, 2017, Coborn's, Inc. recalled packages of Gluten Free Chocolate Chip Bars because some were incorrectly labeled as Gluten Free Fudge Brownies.

Recalls & Warnings

April 08, 2017

Woman Dies After Receiving Turmeric Infusion

On March 16, 2017, a San Diego, California woman died days after receiving an IV infusion of turmeric.   Jade Erick, age 30, suffered a brain injury and cardiac arrest after receiving the first 5 mL of a 250 mL infusion of turmeric in the office of a naturopathic doctor.

Recalls & Warnings

October 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.