It is my understanding that what plant sterols do is block the absorption of cholesterol in the small intestine. Does this refer to food containing cholesterol that is eaten by the person (dietary cholesterol) OR does this include cholesterol manufactured by the person themselves (serum cholesterol).
I ask this because it is my sense that because the blockage of absorbtion takes place in the small intestine that it is only protecting you from dietary cholesterol not serum cholesterol (manufactured by the body). But then I don't know where serum cholesterol goes once it is manufactured by the liver. Perhaps it goes directly into the bloodstream????
If this is the case, is there much of a point in taking plant sterol supplements if your diet hardly ever includes foods high in cholesterol?