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Product Review

Psyllium Fiber Supplements Review

Find the Best Psyllium Fiber Supplement and Avoid Lead.

Psyllium Review 2024

CL Answer

Can psyllium help control hunger and appetite?

Learn more about psyllium (found in Metamucil), including effects on appetite and hunger control, results from clinical studies and safety.


Clinical Update


Lead in Metamucil

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.

CL Answer

Does taking a laxative interfere with the absorption of vitamins or minerals?

Information on laxative interactions with other medications and supplements such as Maalox, antibiotics, and statins and diabetes medications.

Laxatives and vitamin and mineral absorption

CL Answer

Where to Safely Buy Real Vitamins and Supplements Online, Not Fakes or Counterfeits

ConsumerLab explains how to avoid counterfeit vitamins and supplements when shopping online on Amazon,, and other sites. Learn to identify authorized sites and sellers and avoid fake supplements. Use the brand-by-brand guide to protect yourself from risk.

Woman in Orange Sweater

CL Answer

Which supplements and foods help relieve constipation and which can cause constipation?

Find out which supplements can cause constipation, including iron, calcium, protein powders and drinks and others.'s answer explains.

Which supplements can cause constipation? -- Woman with gastrointestinal pain

CL Answer

Which supplements and foods can help lower or control blood sugar?

Find out which supplements can help lower or control blood sugar. Supplements including turmeric/curcumin, fiber, cinnamon, and ginseng are believed to help lower blood sugar.

Blood Sugar Control -- blood test and blood sugar chart

Clinical Update


Avoid Counterfeits: 4 Brands Added

Counterfeit versions of supplements have been sold on sites such as Amazon. Learn on how to safely purchase products online for 62 brands. We recently added information for Metamucil, Emergen-C, Dr. Mercola, and Healthy Origins.

CL Answer

Do any supplements naturally suppress appetite and help with weight loss?

Learn which natural ingredients can suppress appetite and find if these natural appetite suppressants help with weight loss.

Container of natural appetite suppressant supplement with measuring tape and scale in background

CL Answer

Which vitamins and minerals should be taken together or separately?

Find out the best way to take vitamins and minerals and which vitamins and minerals should be taken together or separately for proper absorption. ConsumerLab answer explains the best way to take vitamins and minerals.

Vitamins & Minerals That Should Be Taken Together or Separately -- various vitamins in spoons

News Release

February 25, 2024

Top-rated Vitamin and Supplement Brands and Merchants for 2024 Based on Consumer Satisfaction

White Plains, New York, February 25, 2024 — Each year, surveys its free e-newsletter subscribers about the vitamins and supplements that they use. The results below are based on over 10,000 responses collected in November/December 2023.