What is commonly referred to as bad cholesterol?

LDL cholesterol, commonly known as "bad cholesterol," is associated with an increased risk of cardiovascular diseases. Elevated levels of LDL cholesterol can lead to the buildup of plaque in the arteries, which narrows them and can result in atherosclerosis, heart attacks, and strokes. This designation of "bad" reflects its role in contributing negatively to heart health.

In contrast, HDL cholesterol is often called "good cholesterol" because it helps transport cholesterol away from the arteries and back to the liver for excretion. This function of HDL is protective against heart disease, which is why it does not carry the same risk as LDL. Triglycerides, while they can also be elevated in certain conditions, are not classified as cholesterol and have a different role in the body, primarily serving as a form of fat storage. VLDL cholesterol, like LDL, is also considered to be harmful, but it is not as commonly referenced in discussions about cholesterol types as LDL. Thus, LDL cholesterol is specifically recognized as the major type of cholesterol contributing to cardiovascular risk, justifying its label as "bad" cholesterol.