cholesterol
n. uncountablen. a fatty substance found in your blood and body cells. Your body needs some of it to work, but having too much can cause heart problems.
n. a sterol found in most body tissues, including the blood and the nerves. It functions as a structural component of mammalian cell membranes and as a precursor for steroid hormones.
Eating too much fried food can raise your cholesterol.
The doctor recommended a low-fat diet and regular exercise to help lower his high cholesterol levels.
While the body requires cholesterol for synthesizing vitamin D and bile acids, an excess of low-density lipoproteins is strongly associated with the development of atherosclerosis.
Borrowed from French cholestérol.
Uncountable in its general biological sense; can be used with 'levels' or 'count' to refer to specific measurements.