Fiber Probiotic: answers on fiber and regularity

A heaping spoonful of Easy Mix Fiber being stirred into a mug of tea beside the open tub — Easy Mix Fiber going into a mug of tea. One heaping spoonful holds 6 g of fiber, per the label.

Fiber typesOct 6, 2026

Fiber that doesn't cause gas: fiber types compared by grams and how much they ferment

Fibers ferment at different speeds. A lab model found inulin made more gas than psyllium or wheat dextrin, and a small trial found psyllium only delayed it. What that means, gram by gram.

By the Physician's Choice editorial team Published Oct 6, 2026 Last checked Oct 12, 2026 4 min read

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Fiber that doesn't cause gas: fiber types compared by grams and how much they ferment

The lab model, the 17-person trial and the grams on three labels.

On the shelf

Fiber per serving, from the label

Our publisher, Physician's Choice, makes these four products. One serving of each is drawn on the same gram scale below.

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Grams of fiber in one serving

Serving sizes differ: one heaping spoonful, 2 gummies, 2 gummies and 5 capsules.

Easy Mix Fiber

6 g per heaping spoonful. Soluble corn fiber and guar fiber, about 24 servings.

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Fiber Gummies

5 g per 2 gummies. Chicory root fiber, under 1 g total sugars, 30 servings.

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Probiotic Gummies

3 g per 2 gummies. 1 billion CFU B. subtilis, 0 g sugar, 45 servings.

See it on physicianschoice.com

Psyllium Husk Fiber

2 g per 5 capsules. 2.6 g psyllium husk, 60 servings.

Label read Oct 10, 2026

Fiber from food comes first

NIDDK puts the adult range at 22 to 34 grams a day, depending on age and sex, and lists these foods as good sources. Go up a little at a time, with plenty to drink.