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Product Reviews (1)

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Vitamin C Supplements Tested by ConsumerLab.com

Vitamin C Supplements Review

CL Answers (4)

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Which deodorants and antiperspirants are contaminated with benzene and which are not?

Benzene, a carcinogen, has been detected in over 40 spray deodorants, antiperspirants, and body sprays. Tests were conducted on brands including Axe, Bath & Body Works, Brut, Degree, Dove, Gold Bond, Right Guard, Secret, Speed Stick, Suave, Old Spice, Victoria's Secret and others. Find out which products contained benzene, and how much they contained.

Benzene in Spray Deodorant

Does Oral-B Glide or other dental floss contain toxic chemicals called PFAS? Where else are PFAS found, and how can I avoid them?

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

How Should You Take Care of Yourself After You’ve Had COVID-19?

Find out the best way to care for yourself when recovering from COVID-19, including how long you should quarantine, whether you should get vaccinated, when it is safe to undergo a surgery, and how to spot and, possibly, improve lingering symptoms.

Man in wheelchair talking with doctor after recovering from COVID

Is cinnamon dangerous for my liver? I put about a teaspoon of it in my oatmeal every day.

The most common form of cinnamon contains a naturally occurring liver toxin called coumarin. Find out how much cinnamon is safe to consume, and how often it can be consumed. Also learn how much coumarin ConsumerLab found in popular cinnamon and spices.

Liver Danger With Cinnamon -- Bowl of oatmeal with cinnamon and cinnamon sticks

Recalls & Warnings (41)

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5/29/2021

FDA, FTC Warns Five Sellers of "Infertility" Supplements
5/14/2021

Maker of Care by Design CBD Settles Charges of Unsupported Claims
12/11/2020

Goldenseal Recalled Due to Microbial Contamination
9/11/2020

Seller of "COVID PACK" Warned for Coronavirus Claims
8/15/2020

FTC Warns 20 More Companies for Coronavirus Claims
5/23/2020

FTC Warns 50 More Companies for Coronavirus Claims

4/21/2020

Life Force Warned for Colloidal Silver, Nitric Oxide Claims
11/09/2019

Biotin Supplements Can Cause False Lab Test Results
2/13/2019

Supplements Promoted for Alzheimer's Disease and Dementia Sell "False Hope," Warns FDA
1/10/2018

Lithium Supplement Contaminated With E. Coli, Health Canada Warns
11/21/2017

Health Canada Calls for Stronger Warnings of Liver Risk on Green Tea Extract Products
9/28/2017

Seller of Prostate, Reishi Supplements Warned for Manufacturing Violations
1/28/2017

FDA Testing Confirms Elevated Levels of Belladonna in Some Homeopathic Teething Products
12/16/2015

Maker of Red Yeast Rice, St. John's Wort, Valerian and More Warned for Manufacturing Violations, Drug Claims
9/18/2015

High Levels of Mercury and Lead Found in Ayurvedic Herbal Supplements
11/06/2014

Seller of Cholesterol, Arthritis Supplements and More Warned for Drug Claims
5/20/2014

FTC Charges Seller of Green Coffee Bean with False Weight Loss Claims, Fake Websites
3/21/2014

Homeopathic Products Recalled Due to Allergy Risk
5/24/2013

Seller of Liquid Minerals, Joint Care and Herbal Supplements Warned For Manufacturing Violations, Drug Claims
3/29/2013

Prescription Drugs Found In Prostate and Sexual Enhancement Supplements
2/06/2013

Vitamin and Supplement Maker Warned For Labeling Errors, Manufacturing Violations
9/18/2012

Consumers Warned Not To Use Gastrointestinal Product Containing Withdrawn Prescription Drug

6/04/2012

FDA Warning on Supplement for Pain Relief
5/17/2012

FDA Warns of Drug Ingredients in Three Sexual Enhancement Supplements
4/21/2012

FDA Finds Prescription Drug Analog in 3 Enhancement Supplements
4/03/2012

“Japan Rapid Weight Loss Diet Pills Green” Contains Hidden Drug Ingredient
4/03/2012

"France T253" Enhancement Supplement Contains Hidden Drug
11/06/2009

FDA Warns that "Stiff Nights" Enhancement Supplement Contains Undeclared Drug
7/29/2009

FDA Warns Against Body Building Supplements with Steroid-like Compounds
6/16/2009

FDA Warns of Loss of Sense of Smell with Zicam Nasal Gel/Nasal Swab
5/13/2009

Body-Building Supplements Confiscated by FDA for Adulteration
4/07/2008

Federal Agents Seize Nearly $1.3 Million of Illegal Dietary Supplements
3/28/2008

FDA Warns of Adverse Reactions with Two Liquid Supplements -- Selenium Toxicity Possible
3/25/2008

FDA Warns of Sexual Supplements with Drug-like Ingredients
12/30/2007

FDA Warns Consumers Not to Use Several "Shangai" Sexual Enhancement Supplements
5/10/2007

FDA Warns of Two Supplements Containing Pharmaceutical-like Compounds
11/03/2004

FDA Warns of Sexual Enhancement Supplements Containing Prescription Drug
1/02/2004

Health Canada Warns Consumers Not to Use Health Products Containing Comfrey
5/28/2003

Warning and Recall for "Herbal" Sexual Enhancement Supplement in Canada Illegally Containing Pharmaceutical Compound
6/21/2002

Canadian Warning on Use of Seven Herbal Supplements from BotanicLab
3/25/2002

FDA Advises Consumers of Risk of Severe Liver Toxicity with Kava
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Clinical Updates (2)

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8/07/2021

Vitamin D and Palliative Cancer Care
Can high-dose vitamin D supplementation in palliative care cancer patients reduce pain and fatigue? Find out what a recent study showed in the Cancer section of our Vitamin D Supplements Review. Also see our Top Picks for vitamin D.
10/16/2020

Melatonin for Better Sleep
Can melatonin improve sleep in people hospitalized and receiving intensive care? See what a recent study found in the What It Does section of our Melatonin Supplements Review. Also learn about melatonin for improving sleep with other conditions, and see our Top Picks for melatonin.

News Releases (37)

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9/11/2021

Best CoQ10 and Ubiquinol Supplements Identified in Testing by ConsumerLab
8/27/2021

ConsumerLab Tests Reveal Best Joint Health Supplements for People and Pets
8/15/2020

ConsumerLab Tests Show Not All Vitamin E Supplements Contain What They Claim
7/10/2020

Best and Worst Tuna, Salmon and Sardines? ConsumerLab Tests Reveal Amounts of Omega-3s and Toxic Heavy Metals in Canned and Packaged Fish
6/06/2020

Best Vitamin C Supplements Revealed by ConsumerLab
4/28/2020

Best and Worst Multivitamins Revealed by ConsumerLab -- Problems Found With 44% of Multis Tested
7/31/2019

ConsumerLab Tests Reveal Best CoQ10 and Ubiquinol Supplements
3/07/2019

Best Coconut and MCT Oils Identified by ConsumerLab
11/19/2018

Tests Reveal Best Fish Oil Supplements and How They Compare to Prescription Fish Oil
10/02/2018

Best Joint Health Supplements Identified -- ConsumerLab Tests Glucosamine, Chondroitin, MSM and Boswellia Supplements for People and Pets
11/01/2017

Gummies Are Most Likely to Fail Testing in Review of Multivitamins -- Best and Worst Multivitamins Identified by ConsumerLab Testing
6/21/2017

Which Magnesium Is Best? ConsumerLab.com Tests Popular Brands and Reveals Its Top Pick
5/26/2017

ConsumerLab.com Tests Reveal the Best Calcium Supplements
5/17/2017

Best Vitamin D? ConsumerLab.com Tests Popular Vitamin D Supplements and Reveals Its Top Picks
3/15/2017

ConsumerLab.com Reveals Best and Worst Vitamin C Supplements -- 20% Fail ConsumerLab.com Tests of Quality
2/23/2017

ConsumerLab.com Reveals Best and Worst B Vitamin Supplements and Why Current Labels Often Mislead
1/10/2017

Your Extra Virgin Olive Oil May Not Be, According to Review By ConsumerLab.com -- Top Picks Noted for Best Quality and Value
12/21/2016

Best CoQ10? ConsumerLab.com Tests Popular CoQ10 and Ubiquinol Supplements and Reveals Its Top Picks
6/03/2016

What Works for Joint Health? ConsumerLab.com Reviews Glucosamine, Chondroitin, MSM and Boswellia Supplements for People and Pets
10/14/2015

Is Matcha a Better Form of Green Tea? ConsumerLab.com Answers the Question
8/28/2015

Not All Vitamin E Supplements Are Alike, Especially "Natural" Ones, ConsumerLab.com Tests Reveal
6/10/2015

ConsumerLab.com Tests Reveal Best and Worst Magnesium Supplements
4/28/2015

Best Supplements for Bone Health? ConsumerLab.com Finds Products with Multiple Ingredients More Likely to Contain Wrong Amounts
3/17/2015

CoQ10 & Ubiquinol Supplements Vary in Quality, as Well as Dose, Absorption, and Price According to ConsumerLab.com
4/09/2014

Best Fish Oil? ConsumerLab.com Testing Finds Many High Quality Supplements, But Pitfalls Exist
2/26/2014

Mislabeling of Some Joint Health Supplements with Glucosamine, Chondroitin, Boswellia, and MSM According to ConsumerLab.com -- 38 Supplements Tested, Including Products for Dogs and Cats --
1/29/2014

You May Be Getting More Vitamin C Than You Think from Some Supplements, Cautions ConsumerLab.com -- 27% of Vitamin C Supplements Don't Meet Label Claims in Recent Tests --
3/05/2013

CoQ10 & Ubiquinol Supplements Should Be Chosen Carefully, Cautions ConsumerLab.com -- Less Than 4% of Listed Ingredient Found in Widely-Sold Product
9/27/2012

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
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
5/08/2012

Lead Contamination and Mislabeling in Joint Health Supplements with Glucosamine, Chondroitin, and MSM According to ConsumerLab.com
3/12/2012

Review of vitamin C supplements by ConsumerLab.com finds many of high quality but a wide range in prices
10/31/2011

Supplements for lactose intolerance vary in strength and cost, and some offer no benefit, according to ConsumerLab.com
4/26/2011

Problems discovered with eight vitamin D supplements in study by ConsumerLab.com -- Incorrect amounts of vitamins, lead contamination, and labeling infractions identified.
3/08/2011

ConsumerLab.com reviews CoQ10 and ubiquinol supplements -- Tests show quality to be high, but large differences found in dosage, formulation, and cost
3/06/2007

ConsumerLab.com produces series of free online seminars about dietary supplements — First seminar on "joint health" now available
10/10/2006

Care advised with natural cold remedies: ConsumerLab.com finds few products with proper quality and directions — ConsumerLab.com offers advice from tests of echinacea, garlic, ginseng, vitamin C, and zinc supplements
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  1. Product Reviews
  2. CL Answers
  3. Recalls & Warnings
  4. Clinical Updates
  5. News Releases