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For Heart Health: Psyllium fiber, the natural dietary fiber found in Metamucil, is clinically proven to help lower cholesterol levels because it forms a thick gel that traps some cholesterol, bile acids and waste in the gut.
The maltodextrin in Metamucil is a carbohydrate derived from cornstarch. It is used to improve texture and aid in mixing. Maltodextrin contains approximately 25 percent digestible sugars, as compared to sucrose, or table sugar, which consists of 100 percent sugars.s it OK to take Metamucil with food? Should I take it before or after meals? Any time of day is appropriate to take Metamucil as long as an adequate intake of fluids (at least 240 mL or 8 oz of cool water or liquid per dose) is consumed.