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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.
Takeaway: Eases painful symptoms of IBS and Crohnâs disease. Fiber Content of Metamucil Orange Smooth Powder: 6 grams per 2 tbsp. Fiber Content of Metamucil Fiber Capsules: 2 grams per 5 capsules. Wheat dextrin, most commonly sold under the brand name Benefiber, is a manufacturing byproduct of the wheat plant.