JUNIPER PUBLISHERS-OPEN ACCESS JOURNAL OF CARDIOLOGY & CARDIOVASCULAR THERAPY Abstract The main biological function of the lipids includes storing energy, signaling, and acting as structural components of cell membrane. Lipids, such as cholesterol and triglycerides, are insoluble in plasma and circulating lipids are carried in lipoproteins to various tissues for energy utilization, lipid deposition, steroid hormone production, and bile acid formation. This review article will present the different types, functions and metabolism of the lipids. Keywords: Lipid profile; Cholesterol; HDL; VLDL; LDL Cholesterol Cholesterol is designated as 3-betahydroxy-5, 6-cholestene. Cholesterol is widely distributed in all the cells of the body, particularly abundant in nervous tissues. Higher concentration of cholesterol is found in brain, liver, kidney, adipose tissue and suprarenal glands in both free and esterified forms. In plasma, esterified form comprises 65-75% and...