Metamucil® 3-in-1 Fiber Fiber Supplement Capsule 100 per Bottle 0.4 Gram Strength Potassium / Psyllium Husk (1229256_BT) 1/BTFive Metamucil capsules contain at least 1. 8 grams of this soluble fiber. Diets low in saturated fat and cholesterol that include 7 grams of soluble fiber per day from psyllium husk, as in Metamucil, may reduce the risk of heart disease by lowering cholesterol. Metamucil is the only leading brand that contains plant based psyllium fiber that helps promote digestive health and regularity. Metamucil, through its gelling action, helps slow sugar