When this happens the bile acids can't be resorbed by the gut and thus the body has to produce more bile acids.
Cholesterol is a main component of bile acids.
Two Kinds of Fiber Fibers differ greatly in water holding capacity. Soluble Fiber Soluble fiber holds 40 times it's weight in water. Psyllium is an example of this type of fiber. Soluble fiber is digested by the normal gut flora and is the primary food source for this bacteria. Bacteria will produce short chain fatty acids from soluble fiber.