ConsumerLab.com uses JavaScript to provide the best possible experience for our content, but your browser has it disabled. Learn how to enable it here.

Reviews & Articles

Membership & Subscription

About ConsumerLab.com

About Testing

News

Showing Results for Natural Factors

Recalls & Warnings (1)

Search term may appear only in full report available to members. Join now for full access.

3/12/2016

FDA Finds Problems at 58% of Supplement Manufacturing Sites in U.S. and Abroad

News Releases (51)

Search term may appear only in full report available to members. Join now for full access.

2/25/2022

Top-rated Vitamin and Supplement Brands and Merchants for 2022 Based on Consumer Satisfaction
9/11/2021

Best CoQ10 and Ubiquinol Supplements Identified in Testing by ConsumerLab
2/25/2021

Top-rated Vitamin and Supplement Brands and Merchants for 2021 Based on Consumer Satisfaction -- Results of the ConsumerLab.com Survey of Vitamin & Supplement Users
12/11/2020

Caution With Cinnamon: ConsumerLab Tests Reveal High Amounts of Toxin in Some Supplements and Spices
2/25/2020

Top-rated Vitamin and Supplement Brands and Merchants for 2020 Based on Consumer Satisfaction -- Results of the ConsumerLab.com Survey of Vitamin & Supplement Users
9/27/2019

Best Turmeric and Curcumin Supplements and Spices Identified by ConsumerLab
7/31/2019

ConsumerLab Tests Reveal Best CoQ10 and Ubiquinol Supplements
7/10/2019

Best Selenium Supplements Identified by ConsumerLab
2/25/2019

Top-rated Vitamin and Supplement Brands and Merchants for 2019 Based on Consumer Satisfaction -- Results of the ConsumerLab.com Survey of Vitamin & Supplement Users
7/31/2018

Best L-Tryptophan and 5-HTP Supplements Identified by ConsumerLab -- ConsumerLab Tests Strength and Purity of Supplements for Sleep and Mood
2/25/2018

Top-rated Vitamin and Supplement Brands and Merchants for 2018 Based on Consumer Satisfaction
10/19/2017

ConsumerLab.com Reveals Best Zinc Lozenges and Supplements for Shortening Colds and Correcting Deficiency
9/26/2017

ConsumerLab.com Explains How to Take Melatonin and Reveals Its Top Supplement Picks
6/21/2017

Which Magnesium Is Best? ConsumerLab.com Tests Popular Brands and Reveals Its Top Pick
4/25/2017

Caution with Kelp Supplements: May Contain Too Much Iodine
4/04/2017

ConsumerLab.com Reveals Best and Worst Turmeric and Curcumin Supplements & Spices -- 31% Fail ConsumerLab.com Tests of Quality
2/25/2017

Top-rated Vitamin and Supplement Brands and Merchants for 2017 Based on Consumer Satisfaction
2/23/2017

ConsumerLab.com Reveals Best and Worst B Vitamin Supplements and Why Current Labels Often Mislead
11/15/2016

ConsumerLab.com Finds Arsenic in Testing of Potassium Supplements -- Safer Choices Identified. Many Americans May Need More Potassium
9/13/2016

Best Fish Oil? ConsumerLab.com Tests 44 Popular Omega-3 Supplements and Identifies Its Top Picks
2/25/2016

Top-rated Vitamin and Supplement Brands and Merchants for 2016 Based on Consumer Satisfaction
1/12/2016

Problems Found with 32% of Multivitamin/Multimineral Supplements -- ConsumerLab.com Identifies Good Choices for Men, Women, and Children
12/17/2015

ConsumerLab.com Focuses on Vision Supplements, Spotting the Best and the Worst
3/17/2015

CoQ10 & Ubiquinol Supplements Vary in Quality, as Well as Dose, Absorption, and Price According to ConsumerLab.com
2/25/2015

Top-rated Vitamin and Supplement Brands and Merchants for 2015 Based on Consumer Satisfaction -- Results of the ConsumerLab.com Survey of Vitamin & Supplement Users
4/09/2014

Best Fish Oil? ConsumerLab.com Testing Finds Many High Quality Supplements, But Pitfalls Exist
2/12/2014

Top-rated Vitamin and Supplement Brands and Merchants for 2014 Based on Consumer Satisfaction -- Results of the ConsumerLab.com Survey of Vitamin & Supplement Users
8/21/2013

Labels on Potassium Supplements May Confuse, But Product Quality is High According to ConsumerLab.com
2/01/2013

Top-rated Vitamin and Supplement Brands and Merchants for 2013 Based on Consumer Satisfaction
11/26/2012

Tests Show Many Milk Thistle Supplements Low in Key Component -- Seven of Eleven Products Fail ConsumerLab.com Testing of Herb Used in Diabetes and Liver Diseases
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
8/22/2012

Contamination and Other Problems Found in Fish Oil Supplements -- Large Review by ConsumerLab.com Reveals Excessive PCBs or Mislabeling in Over 30% of Omega-3 Supplements
4/26/2012

ConsumerLab.com reviews prostate supplements with saw palmetto and/or beta-sitosterol and finds few likely to be effective
2/01/2012

Top-rated vitamin and supplement brands and merchants on consumer satisfaction for 2012 -- Based on ConsumerLab.com Survey of Vitamin & Supplement Users
10/31/2011

Supplements for lactose intolerance vary in strength and cost, and some offer no benefit, according to ConsumerLab.com
9/21/2011

Not all vitamin A supplements pass ConsumerLab.com tests -- New report reviews beta-carotene and cod liver oil supplements
6/16/2011

ConsumerLab.com puts multivitamins to the test
2/16/2011

Some turmeric and curcumin supplements fail quality review -- ConsumerLab.com finds 20% of turmeric supplements selected for review deliver less than 15% of promised compounds
2/01/2011

Top-rated vitamin and supplement brands and merchants on consumer satisfaction for 2011 -- Based on ConsumerLab.com survey of vitamin and supplement users 
1/31/2011

Vitamin D use increased 52% in past two years according to ConsumerLab.com survey of supplement users -- Fish oil continued to surpass multivitamins as most popular supplement and Internet was most common place to buy supplements
9/28/2010

ConsumerLab.com finds quality problems with nearly 30% of fish oil supplements reviewed; "Fishy" claims identified -- Softgels and liquids for adults, children and pets tested, including krill oil and algal oil supplements 
6/09/2010

ConsumerLab.com tests "greens" and "whole foods" products; Most offer healthful nutrients, but some found contaminated with heavy metals
3/02/2010

ConsumerLab.com finds carcinogenic form of chromium in supplements, including those for weight loss -- Reviews published of supplements containing chromium, green tea, 7-keto DHEA and stimulant formulas
12/02/2009

Tests show many milk thistle supplements low in key component -- Nine of ten products fail ConsumerLab.com testing of herb used in diabetes and liver diseases
10/02/2008

ConsumerLab.com finds melatonin supplements range in strength but ingredient quality is high
8/05/2008

ConsumerLab.com Find Fifty Fish Oil Supplements Pass Quality Testing -- New Report Helps Consumers Choose Among Pills, Liquids, Foods and Beverages with Omega-3 Fatty Acids (EPA and DHA)
10/30/2007

Recently tested magnesium supplements free of lead, but one product missing most of its ingredient according to ConsumerLab.com — First Major Product Review of Potential "Life-Extending" Ingredient
5/15/2007

ConsumerLab.com finds some alpha lipoic acid supplements come up short — Improper formulation may cause ingredient degradation
12/12/2006

Probiotic supplements grow in popularity but viable bacteria missing in many — ConsumerLab.com cautions consumers to select probiotics carefully and store them properly
8/16/2005

ConsumerLab.com tests potassium supplements — Report now online for sixteen products
6/15/2005

Two magnesium supplements fail testing due to lead contamination. Nineteen others pass. Report now available.
Load More…
Results
  1. Product Reviews
  2. CL Answers
  3. Recalls & Warnings
  4. News Releases