154 Drugs li KT used in Hyperlipoproteinemias Lipid-Lowering Agents Triglycerides and cholesterol are essential constituents of the organism Among other things, triglycerides represent a form of energy store and cholesterol is a basic building block of biological membranes Both lipids are water insoluble and require appropriate trans- port vehicles in the aqueous media of lymph and blood To this end, small amounts of lipid are coated with a layer of phospholipids, embedded in which are additional proteins—the apolipoproteins (A) According to the amount and the composition of stored lipids, as well as the type of apolipoprotein, one distinguishes transport forms: Origin Density Chylomicron Gut epithelium