HDL cholesterol

Lipoprotein particles carry fat molecules: cholesterol, phospholipids ; triglycerides around the body in the water outside cells, including the blood. These particles vary in types of protein on the outer surface, ↓density ; ↑size (5 groups) according to the number of fat molecules carried. High density lipoprotein (HDL) cholesterol is the amount of cholesterol contained within HDL particles.