... , including the Agen variety.Prunes' Fiber for Regularity, Lower Cholesterol, & Intestinal ProtectionPrunes are well known for their ability ... insoluble fiber may also be partly responsible for the cholesterol-lowering properties of fiber. In animal studies, propionic ... , propionic acid helps lower blood cholesterol levels.In addition, prunes' soluble fibers help to lower cholesterol by binding to bile ...