What is High-Density Lipoprotein Cholesterol?
High-density lipoprotein is the smallest, densest lipoprotein, assembled in the liver and intestine around apolipoprotein A-I. It is central to reverse cholesterol transport, accepting cholesterol from peripheral tissues — including macrophages within the arterial wall — and returning it to the liver for excretion, and it carries anti-inflammatory and antioxidant activity. HDL-C is the cholesterol contained within these particles; it is a measure of cholesterol concentration, not of HDL particle number or particle function.