Good Cholesterol vs. Bad Cholesterol

Understanding the two types of cholesterol, which have different purposes and are broken down in different ways, can be confusing. These explanations will give you a better picture of what they are and how they work in your body:

What is HDL-C?

High-density lipoprotein cholesterol — HDL-C — is the “good” cholesterol. It is good because this cholesterol is being carried from the blood vessels to the liver, where the body can break it down. That is why you need a high level of HDL-C. If it’s too low, it can’t carry cholesterol away. A high level of HDL-C may decrease your risk of having a heart attack or stroke, while a low level may increase your risk.

What is LDL-C?

Low-density lipoprotein cholesterol — LDL-C — is the “bad” cholesterol in your body. LDL carries the majority (65%-75%) of the cholesterol in the bloodstream. Too much LDL-C can cause cholesterol to build up on the artery walls, which is called atherosclerosis. Atherosclerosis increases a person’s risk for having a heart attack.

What is Apolipoprotein B (apo B)?

Apolipoprotein B (apo B) is a protein that is found in low-density lipoprotein (LDL). People who have high cholesterol that is caused by a difference in their genetic makeup often have high levels of apo B.

What are triglycerides?

Triglycerides, the most common form of fat in the body, are stored in fat cells and used as energy. They too are made by the body and found in many foods. Elevated levels of triglycerides also are linked to developing heart disease.

Read more about triglycerides