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What is cholesterol and what does it have to do with heart disease?

Cholesterol is a waxy substance that occurs naturally in all parts of the body and that your body needs to function normally. It is present in cell walls or membranes everywhere in the body, including the brain, nerves, muscle, skin, liver, intestines, and heart. Your body uses cholesterol to produce many hormones, vitamin D, and the bile acids that help to digest fat. It takes only a small amount of cholesterol in the blood to meet these needs. However, if you have too much cholesterol in your bloodstream, it can lead to atherosclerosis, a condition in which fat and cholesterol are deposited in the walls of the arteries in many parts of the body, including the coronary arteries feeding the heart. In time, narrowing of the coronary arteries by atherosclerosis can produce the signs and symptoms of heart disease, including angina and heart attack.

Click on any of the links below for more specific information.

bulletThe Benefits of Cholesterol Lowering

bulletLipoproteins

bulletWhat Makes Blood Cholesterol High or Low?

bulletUnstable Plaque

How You Can Lower Cholesterol LevelsArrow (green) right


NHLBI Home Page   |   NCEP Home Page   |   NIH Home Page

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