Best Psyllium Husk

Psyllium is the husk of Plantago ovata seed. “Husk” and “powder” on a label are usually the same material milled finer or coarser. A capsule is that material in a shell, so the grams per swallow are smaller than a teaspoon of powder. Compare grams of psyllium per serving, not the size of the tub.

The best fiber supplement guide, checked October 21, 2026, cites the 2023 AGA/ACG constipation guideline, the 2021 ACG IBS guideline, the FDA soluble-fiber claim at 21 CFR 101.81, and a 2018 LDL meta-analysis. Those citations are not repeated as if we re-read them for this page. This page is the form and the lead record.

Labels on that fiber guide, from DailyMed, warn to mix each dose in at least 8 ounces of liquid and drink it promptly, because of choking. That warning applies to bulk powder. It is a label instruction, not a dose we are setting.

We are not making a contamination claim from a test Evident ran. Evident has no psyllium lab data.

ConsumerLab’s news post of February 29, 2024 says its tests found lead in psyllium fiber supplements it purchased. The post says four of nine products contained 2.4 to 38.7 mcg of lead if taken at the maximum suggested daily serving, and that one product contained more than 60 times California’s Proposition 65 warning level of 0.5 mcg per daily serving. The same post also says lead was found in all eight psyllium products. Those two counts are both in the public post. We did not open the membership table, so this page does not say which of the named products were the high ones, and it does not repeat ConsumerLab’s “top pick.” The products the post says were selected for testing include Citrucel, Equate Daily Fiber, Konsyl, Meta Mucil 3-in-1 Fiber, NOW, Organic India, Swanson, Viva Naturals, and Yerba Prima. Being on that list is not a pass or a fail.

A separate ConsumerLab clinical-update page says the company found lead in Metamucil when it tested a product in 2021, and that a lawsuit filed around December 2023 alleged undisclosed lead in Metamucil products. We did not open the complaint or the 2021 data table.

On July 27, 2026, Environmental Research Center, Inc. filed California 60-day notice 2026-03609 alleging lead and lead compounds in several named Metamucil powders, thins, and a collagen blend, against The Procter & Gamble Company and The Procter & Gamble Manufacturing Company. A 60-day notice is an allegation that starts a clock. It is not a judgment and not a lab report we reviewed.

What you can ask a brand for is a lot-specific certificate of analysis that reports lead in micrograms per serving, at the dose you would actually take. A sentence that says “third-party tested,” with no document, is a claim.

Gas and bloating are the common early complaints, which is why the fiber guide says to start low. The choking warning on bulk-fiber Drug Facts labels is the other practical risk: take the dose with enough water, and skip bulk powders if you have trouble swallowing. People with a history of bowel obstruction, rectal bleeding, or a sudden change in bowel habits should talk to a clinician first. Fiber can also affect the timing of other medicines. Those points are label and clinical-common-sense limits already stated on the fiber guide. This page does not add a side-effect percentage from a new paper.

Metamucil is a brand of psyllium products, not a different fiber. The fiber guide’s example, from DailyMed on October 21, 2026, was Metamucil Therapy for Regularity, sugar-free, at about 3.4 grams of psyllium husk per packet. Other Metamucil products are different formulas, including the ones named in the 2026 notice. Read the panel in front of you. “Metamucil” on its own is not a lead result.