This document provides information about lipid profile testing, including the components measured, specimen requirements, and normal ranges. A lipid profile measures total cholesterol, HDL cholesterol, LDL cholesterol, and triglycerides. Total cholesterol is the sum of LDL, HDL, and 1/5 of triglycerides. HDL removes excess cholesterol from blood vessels while high LDL deposits cholesterol in blood vessels. Normal ranges are provided for each component. Additional tests mentioned include VLDL cholesterol, apolipoproteins, and phospholipids.