The process within the body to produce cholesterol is called cholesterol biosynthesis. It consists of a number of steps which rely on numerous enzymes and processes to reach the final product.Cholesterol is essential for normal functioning of the body, in the right amount.he statins work by inhibiting the action of the enzyme, HMG Co A Reductase, which forms part of cholesterol biosynthesis in the step that produces mevalonate. By inhibiting the enzyme, the conversion to mevalonate is decreased and therefore cholesterol is lowered.