Just What Is Cholesterol?

Cholesterol comes from two sources:

Serum (blood) cholesterol flows through the bloodstream. Your body manufactures most of its blood cholesterol, but it absorbs some from the foods you eat. When your doctor conducts a cholesterol test, he is testing your serum cholesterol levels. A total blood cholesterol level of less than 200 mg/dL is a healthy goal. The amount of cholesterol you have in your blood is partly genetic, but your habits (smoking, diet, exercise, etc.) affect the level of cholesterol in your blood too.

Dietary cholesterol is found only in foods of animal origin, such as meat, fish, eggs, and dairy products. This source is easier to control than the naturally-occurring cholesterol in your body. Individuals should limit their intake of dietary cholesterol to less than 300 milligrams daily. But, limiting your dietary cholesterol intake is only part of the cholesterol-lowering picture.