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

  1. Home
  2. / Clinical Updates

Clinical Updates

Search
Acai Berry (1)
Acetyl-L-Carnitine Supplements (10)
Alginate Supplements (For Reflux) (4)
Aloe Juices, Gels, and Supplements (2)
Alpha Lipoic Acid Supplements (9)
Apple Cider Vinegar (9)
Ashwagandha Supplements (26)
Astaxanthin Supplements (5)
Avocado Oil (3)
B Vitamin Supplements (170)
Berberine Supplements (11)
Bone Broth (2)
Calcium Supplements (43)
CBD & Hemp Extract Supplements (58)
Chia Seed (2)
Cholesterol-Lowering Supplements (Sterols/Stanols and Policosanol) (12)
Choline Supplements (18)
Chromium Supplements (1)
Cinnamon Supplements and Spices (16)
CLA Supplements (2)
Cocoa Powders, Dark Chocolate, Extracts, Nibs & Supplements (60)
Coconut and MCT Oils (13)
Coconut Waters (2)
Collagen Supplements (37)
CoQ10 and Ubiquinol Supplements (46)
Cranberry Juices and Supplements (17)
Digestive Enzymes (10)
D-Mannose Supplements (1)
Echinacea Supplements (3)
Elderberry Supplements (5)
Electrolytes (3)
Essential Oils (5)
Evening Primrose & Flaxseed (ALA/GLA) (10)
Extra Virgin Olive Oil (34)
Fish Oil /Omega-3 Fatty Acid Supplements (235)
Flaxseed (8)
Fruits, Veggies, and Other Greens Supplements (13)
GABA Supplements (2)
Garcinia Cambogia (HCA) Supplements (6)
Garlic Supplements (12)
Ginger Supplements (15)
Ginkgo Supplements (7)
Ginseng Supplements (10)
Green Coffee Bean Extract Supplements (2)
Green Tea Supplements and Drinks (60)
Hoodia Supplements (1)
Huperzine A Supplements (2)
Inactive Ingredients (11)
Iron Supplements (37)
Joint Health for Animals (11)
Joint Health Supplements (18)
Kelp (Supplements) (4)
Lactose Intolerance Products (1)
L-Arginine Supplements (21)
Lion's Mane and Chaga (8)
Low-Dose Lithium Supplements (5)
L-Theanine Supplements (8)
L-tryptophan and 5-Hydroxy-L-tryptophan (5-HTP) (4)
Lycopene Supplements (7)
Lysine Supplements (1)
Maca Supplements (2)
Magnesium Supplements (53)
Melatonin Supplements (72)
Menopause Supplements (19)
Milk Thistle Supplements (3)
Multivitamin and Multimineral Supplements (34)
Muscle & Workout Supplements (Creatine and BCAAs) (30)
NAC (N-Acetyl Cysteine) Supplements (23)
NAD Boosters (NAD+/NADH, Nicotinamide Riboside, and NMN) (16)
Nutrition Bars (4)
Oat Cereals (12)
Phosphatidylserine Supplements (2)
Plant Based Milks (9)
Pomegranate Juice and Supplements (1)
Potassium Iodide/Iodate (Radioprotective Agents) (1)
Potassium Supplements (15)
PQQ (Pyrroloquinoline Quinone) (1)
Prebiotics (9)
Probiotics (133)
Prostate Supplements (Saw Palmetto and Beta-Sitosterol) (12)
Protein Powders (75)
Psyllium Fiber Supplements (12)
Quercetin & Rutin Supplements (13)
Red Yeast Rice Supplements (23)
Reishi Mushroom Supplements (9)
Resveratrol (Red Wine, Knotweed and Other Sources) (16)
Saffron Supplements (3)
SAMe Supplements (3)
Seaweed Snacks and Foods (2)
Selenium Supplements (12)
Sexual Enhancers (3)
St. John's Wort Supplements (3)
Taurine Supplements (1)
Tuna, Salmon & Sardines (25)
Turmeric and Curcumin Supplements and Spices (101)
Valerian Supplements (3)
Vision Supplements with Lutein, Zeaxanthin & AREDS2 Formulas (25)
Vitamin A Supplements (8)
Vitamin C (39)
Vitamin D Supplements (312)
Vitamin E Supplements (21)
Vitamin K Supplements (15)
Water Filter Pitchers (22)
Weight Loss Supplements (7-Keto DHEA, Forskolin and Stimulant Blend Supplements) (3)
Wellbutrin vs. Generic Bupropion (2)
Zinc Supplements and Lozenges (26)
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011

Psyllium Fiber Supplements

Lead in Meta Mucil

March 12, 2024
Favorited Not Favorited
A CL member asked why Meta Mucil 4-in-1 Fiber powder was not tested by us this year. It is because of the lead contamination we found when we tested it in 2021, as noted in our recent report. Hoping to find less contamination, this year we tested Meta Mucil 3-in-1 capsules, as well as Meta Mucil Fiber Gummies (a prebiotic).

See our Top Picks among psyllium fiber and prebiotic fiber supplements.

Ulcerative Colitis

January 30, 2024
Favorited Not Favorited
Find out if drinking coconut water or taking psyllium helped people with active ulcerative colitis in recent studies. Also see our Top Picks among coconut waters and psyllium supplements.

Lead in Metamucil

December 22, 2023
Favorited Not Favorited
A recently filed lawsuit alleges that Proctor & Gamble failed to disclose "dangerous" amounts of lead in a variety of Metamucil products. Get the details, by product, in our Psyllium Fiber Supplements Review, which includes our tests of Metamucil and our Top Picks among psyllium fiber supplements.

Constipation & Supplements

October 10, 2023
Favorited Not Favorited

Find out which supplements medical experts recommend for chronic versus occasional constipation. See the Laxative use section of our Psyllium Supplements Review, which includes our Top Pick among products.

Also see: Which supplements and foods help relieve constipation and which can cause constipation?

Best Fiber Supplement for Constipation?

May 31, 2023
Favorited Not Favorited

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.

Counterfeit Supplements

May 05, 2023
Favorited Not Favorited

Counterfeit versions of psyllium, a multivitamin, magnesium, and eight other types of supplements from a major brand have been sold online. Details and how to avoid this are in our Psyllium Supplements Review.

A popular brand of mushroom supplements has also reported counterfeit versions of its products. Details and how to avoid this are in our Lion's Mane Review.

Psyllium: Viva Naturals

March 28, 2023
Favorited Not Favorited

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.

Psyllium for Colitis?

February 28, 2023
Favorited Not Favorited

Can supplementing with psyllium help maintain remission in people with ulcerative colitis? Find out what research suggests in our Psyllium Supplements Review.

Also see our answer to the question: Do any supplements help for ulcerative colitis?

ColonBroom

August 12, 2022
Favorited Not Favorited

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.

Psyllium for Uncontrolled Bowel Movements

March 25, 2022
Favorited Not Favorited

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.