HOW DOES BETA-S WORK The two food substance of 300mg beta-sitosterol and 30mg citrus pectin are known cholesterol lowering agents that, when combined together, alter dietary fat and cholesterol absorption. Beta-s is broken down in the upper intestine within 30 minutes after ingestion. The proposed mechanisms of action are: intestinal binding excretion of free cholesterolblocking of absorption sites in the intestinal walls an enzymatic shift decreasing liver cholesterol production increased liver enzyme functions on the breakdown of fats