Good Cholesterol and Bad Cholesterol

Cholesterol travels through the blood in packages called lipoproteins.

• Low density lipoprotein (LDL) is called "bad cholesterol" because it is the main source of cholesterol buildup and blockage in the arteries. Reducing high levels of LDL has been proven to reduce heart disease risk.

• High density lipoprotein (HDL) is known as "good cholesterol" because it takes the bad cholesterol out of your blood and keeps it from building up in your arteries. For HDL, higher numbers are better. Low HDL levels (especially under 40) are linked to a higher risk of heart disease, while HDL levels over 60 protect against heart disease.

It is important to know your LDL and HDL levels in addition to your total cholesterol level.