Non-HDL cholesterol is determined by subtracting high-density lipoprotein (HDL) cholesterol from total cholesterol. The result represents the cholesterol content of all atherogenic lipoproteins, including low-density lipoprotein (LDL), intermediate-density lipoprotein (IDL), very-low-density lipoprotein (VLDL), and lipoprotein(a). For example, if total cholesterol is 200 mg/dL and HDL cholesterol is 50 mg/dL, then non-HDL cholesterol is 150 mg/dL (200 – 50 = 150).
This calculation provides a more comprehensive assessment of cardiovascular risk than LDL cholesterol alone. It accounts for a wider range of cholesterol-carrying particles known to contribute to the development of atherosclerosis, a process where plaque builds up inside the arteries. Historically, LDL cholesterol has been the primary target of cholesterol-lowering therapy; however, research has increasingly highlighted the significance of assessing and managing all atherogenic lipoproteins to effectively reduce the risk of heart disease and stroke.
