Which lipoprotein is known as the 'good cholesterol' because it scavenges excess cholesterol?

• A. Chylomicrons
• B. Low-Density Lipoprotein (LDL)
• C. Very Low Density Lipoprotein (VLDL)
• D. High-Density Lipoprotein (HDL) scavenges excess cholesterol and is considered the 'good' cholesterol

Answer: (D)

High-density lipoprotein (HDL) is involved in reverse cholesterol transport: it picks up excess cholesterol from cells and from atherosclerotic plaques and transports it to the liver for disposal or reuse. This scavenging activity helps reduce plaque formation, so HDL is considered protective against heart disease and is often called the "good" cholesterol. The other lipoproteins have different roles: chylomicrons carry dietary fat from the intestines, VLDL delivers triglycerides from the liver to tissues, and LDL delivers cholesterol to tissues and can contribute to plaque buildup.