Cholesterol synthesis is the process by which the body produces cholesterol, a vital lipid necessary for cell membrane structure and hormone production. This process primarily occurs in the liver and involves a series of enzymatic reactions that convert simpler molecules into cholesterol. The synthesis begins with acetyl-CoA, which is derived from carbohydrates and fats. Through a series of steps, including the formation of mevalonate and isoprenoid units, cholesterol is ultimately produced. This synthesized cholesterol can then be used for various functions, including the production of steroid hormones and bile acids.