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Published: Mar 13, 2024

Bulk-forming laxatives, also known as fiber supplements, work by absorbing water into the bowels. This causes stools to become larger and softer, making them easier to pass.

Here are Money’s picks for the best bulk/fiber-based laxatives, along with information on their active ingredients and general notes about efficacy and side effects.

These products were selected by drugs.com, using a methodology that combines expert assessment with analysis of online reviews, ratings and other customer data.