Which type of lipoprotein is considered "bad cholesterol"?

• A. HDL
• B. VLDL
• C. LDL
• D. Chylomicrons

Answer: (C)

The type of lipoprotein considered "bad cholesterol" is LDL, or low-density lipoprotein. This designation arises from its role in cholesterol transport and its associations with health risks. LDL particles carry cholesterol from the liver to the cells of the body. When there is an excess of LDL in the bloodstream, it can lead to the deposition of cholesterol in the walls of arteries, which contributes to atherosclerosis, a condition characterized by the narrowing and hardening of the arteries that can lead to heart disease and stroke.

In contrast, HDL, or high-density lipoprotein, is often referred to as "good cholesterol" because it helps remove cholesterol from the bloodstream and transports it back to the liver for excretion or recycling. VLDL, or very-low-density lipoprotein, primarily carries triglycerides and is also not considered "bad cholesterol" in the same manner as LDL but can contribute to cardiovascular risk when present in excess. Chylomicrons are lipoproteins formed in the intestines that transport dietary lipids from the digestive tract, and they do not have the same negative connotations associated with cholesterol levels as LDL does. Thus, LDL is specifically identified as "bad cholesterol" because of its detrimental effects on cardiovascular health.