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Lipoprotein (lip-o-PRO-teen)
Compounds of protein that carry fats and fat-like substances, such as cholesterol, in the blood.

Low-density lipoprotein (LDL) (lip-o-PRO-teen)
A form of cholesterol that circulates in the blood. Commonly called "bad" cholesterol.

High LDL increases the risk of heart disease. An LDL less than 100 mg/dl is considered optimal, 100-129 mg/dl is considered near or above optimal, 130-159 mg/dl is considered borderline high, 160-189 mg/dl is considered high, and 190 mg/dl or greater is considered very high.