This is the "good" cholesterol, and knowing your number is essential for protecting your heart. The HDL Cholesterol test measures the level of high-density lipoprotein in your blood. HDL acts as your body's "housekeeper," removing "bad" LDL cholesterol from your arteries and transporting it to the liver for removal. A high level of HDL is protective against heart disease and stroke. This test, requiring a simple blood draw, is a core component of our Lipid Profile. Don't just focus on the bad—boost your good! This test is a key part of a proactive, complete heart health strategy.