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The Best Psyllium Husk and Fiber Supplements

Updated By the HealthWorld editorial teamHow we pick

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Top picks at a glance

  1. 1
    Metamucil 4-in-1 Psyllium Fiber

    Best overall

    Metamucil 4-in-1 Psyllium Fiber

    Fiber Psyllium · Type Soluble

Psyllium husk is a soluble fiber that supports regularity and digestive health, and it's one of the best-studied fiber supplements. Metamucil is the household name built on psyllium and our pick. Plain, unflavored psyllium husk powders contain the same fiber without flavoring or sweeteners, so they're worth considering too.

Our picks

  1. Metamucil 4-in-1 Psyllium Fiber

    #1Best overall

    Metamucil 4-in-1 Psyllium Fiber

    Psyllium husk, a natural soluble fiber, in powder or capsules from the best-known name in daily fiber. Supports regularity and digestive health.

    Fiber PsylliumType SolubleAmazon Full facts →
Amazon's live top 100 in Probiotics

What to look for

Plain or flavored
Plain psyllium husk is just fiber. Flavored versions add sugar or a sweetener, so check the label if you avoid either.
Powder or capsules
Powder gives you more fiber per serving; capsules are convenient, but you may need several to match one scoop.
Plenty of water
Mix psyllium into a full glass of water (at least 8 oz or 240 ml) and drink it right away. Taking it without enough fluid can cause choking or a blockage.
Start low
Begin with a small dose and increase over a week or two to limit gas and bloating.
Space it from medications
Psyllium can slow the absorption of some medicines, so take it at least 2 hours apart from them. Talk to your doctor if you have trouble swallowing or a bowel condition.

Frequently asked questions

Does psyllium husk help with constipation?

Yes. Psyllium is a well-established bulk-forming fiber that helps soften stool and support regularity. It works best taken daily with plenty of water. If constipation is new, severe or lasts more than a couple of weeks, see a doctor.

Does psyllium husk help lower cholesterol?

Studies show psyllium can modestly lower LDL cholesterol as part of a diet low in saturated fat, and the FDA allows a heart health claim for psyllium fiber. It isn't a substitute for prescribed treatment. If you take cholesterol medication, talk to your doctor before adding it.

Does psyllium husk break a fast?

Plain psyllium is mostly fiber with very few digestible calories, so many people who fast for weight management use it during fasting windows. Strictly speaking, anything with calories breaks a fast, and flavored versions with sugar certainly do. If you fast for medical reasons, follow your doctor's guidance.

Are there Metamucil alternatives without aspartame?

Yes. Plain, unflavored psyllium husk powder contains no sweeteners at all. If you prefer Metamucil, compare the labels of its versions, since powders and capsules differ in what they contain.

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