CHOL stands for cholesterol and is a laboratory indicator of cholesterol. Cholesterol is an important lipid component of the human body, accounting for approximately 30% of all animal cell membranes. The tetracyclic structure of cholesterol contributes to the fluidity of cell membranes because the molecule is in the trans configuration, making all molecules of cholesterol except the side chains rigid and planar, and in this structural role, also reduces the permeability of the plasma membrane to neutral solutes, hydrogen and sodium ions. Cholesterol is also used in membrane structures and for other purposes, for which productivity varies depending on cell type and organ function. Approximately 80% of daily cholesterol production occurs in the liver and intestines, with other sites of higher synthesis including the adrenal glands and reproductive organs. Checking the body’s cholesterol indicators can determine if there are diseases in the body caused by abnormal cholesterol. If abnormalities are present, a rational treatment plan can be developed based on its indicators.