Citrucel SmartFiber Caplets Review

Citrucel SmartFiber is a daily fiber supplement that utilizes methylcellulose fiber to help relieve occasional constipation and promote regularity without causing excess gas.

Product Focus: Colon Pouch ComfortAlso covers:Digestion

Tier ⓘ

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Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →

Evidence ⓘ

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How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.

Positive Reviews

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Biohacker Mentions

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Cost per month

$18

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Study, Trial or Testing Result SummaryMembersHuman studies

This product has one active ingredient, methylcellulose, a fiber that does cause allergies, at 500 milligrams in each serving. We found human studies on methylcellulose for colon pouch support or comfort, so we cannot say from research whether it with this goal. …

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Review Totals and SummaryMembers1,339 reviews

1,339 reviews · Amazon 1,337 · Walmart 1 · Ebay 1

Citrucel SmartFiber Caplets have received a largely response from users across major online retailers, and real-world experiences highlight why so people continue to purchase them. The frequently aspect is their overall effectiveness, with numerous reviewers mentioning consistent and reliable from digestive issues such as irregularity or occasional constipation. …

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Biohacker SummaryMembersWhat our biohacker panel says

Our biohacker panel has discussed this product yet.

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RAL SummaryMembersThe tier and why

It is placed in this tier because 93 percent of its 1339 ratings are . human studies were found on methylcellulose for colon pouch support or comfort.

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More DetailsMembersBody systems · Combine with · Possible side effects

Body systems: Digestive system. Combine with and possible side are for members.

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Supplement FactsMethylcellulose 500 mg

Supplement Facts

Serving Size 1 caplet

Servings Per Container 100

Amount Per Serving% Daily Value

Methylcellulose (a non-allergenic fiber)

500 mg

†

† Daily Value not established.

Directions: Take this product (child or adult dose) with at least 8 ounces (a full glass) of water or other fluid. Taking this product without enough liquid may cause choking. See choking warning. Age: adults & children 12 years of age & over, Dose: start with 2 caplets. Increase as needed up to 6 times per day, Maximum Dose: do not exceed 12 caplets per day. children under 12 years: ask a doctor.

Barcode (UPC) 307660419785 · Label source: Walmart · Report a label change

Where to BuyAmazon · Walmart · Citrucel

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We sell no supplements. Prices change; check the store.

Graded October 23, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.