Cholesterol biosynthesis is the process by which the body produces cholesterol, a vital lipid necessary for cell membrane structure and hormone production. This complex process primarily occurs in the liver and involves multiple enzymatic reactions that convert simpler molecules, such as acetyl-CoA, into cholesterol. The biosynthesis pathway begins with the formation of mevalonate from acetyl-CoA, followed by several steps that lead to the production of lanosterol, which is then converted into cholesterol. This process is tightly regulated, as maintaining proper cholesterol levels is crucial for overall health.