Compare Benefiber vs. Metamucil

Head-to-head comparisons of medication uses, side effects, ratings, and more.

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Benefiber

Over-the-counter

Metamucil (psyllium)

Over-the-counter
Supplements fiber and relieves constipation.

Benefiber is an excellent fiber supplement. It's easy to use and doesn't clump up like other supplements.

Helps get things moving.

Metamucil (psyllium) is a natural fiber that is cheap and effective at relieving constipation.

3.8/ 5 average rating with 454 reviewsforMetamucil
Upsides
  • Research shows soluble fibers like Benefiber are useful for people who don’t meet daily fiber recommendations.
  • Benefiber completely dissolves in liquids and doesn’t have a gritty texture like other similar fiber supplements.
  • Comes in multiple forms, including chewables, powders, and caplets.
  • Should cause less gas and bloating than other fiber supplements.
  • Has multiple health benefits including lower blood sugar and cholesterol levels.
  • Inexpensive and available over-the-counter.
  • Made from a natural product.
  • Using Metamucil (psyllium) has multiple benefits, including relieving constipation, lowering cholesterol, and making you feel full.
Downsides
  • If you have a gluten intolerance, celiac disease, are pregnant, or are nursing, check with your doctor before taking Benefiber.
  • Taking too much Benefiber can cause constipation, gas, and bloating.
  • Benefiber doesn’t bulk up stool as much as insoluble fiber supplements.
  • Some people's bodies can become dependent on fiber supplements.
  • Metamucil (psyllium) can take up to 72 hours to relieve constipation.
  • Not the best choice for people who have swallowing problems or can't drink lots of liquids.
  • Metamucil (psyllium) can cause gas and stomach cramps.
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Used for
Dosage forms
  • Liquid
  • Pill
  • Chewable tablet
  • Pill
  • Powder
No pricing information available
No pricing information available
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Reviews
Not enough review data.Leave a review
454 reviews so far
71%
saidit'sworth it
45%
saiditworked well
10%
saidit'sa big hassle

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Side effects
The Benefiber FDA package insert doesn’t have numbers about how common side effects are.
The Metamucil (psyllium) FDA package insert doesn’t have numbers about how common side effects are.
Risks and risk factors
  • Warnings
    • Pregnant
    • Nursing
    • Kidney stones
  • Fiber intake
  • Medication interactions
See more detailed risks and warnings
  • Blockage of small or large intestine
    • Age 60 or older
    • Cancer
    • Taking medicines that cause constipation
    • Limited liquid intake
  • Choking
    • Limited liquid intake
    • Swallowing problems
  • Serious allergic reaction
    • Hypersensitivity to psyllium
See more detailed risks and warnings