Cholesterol is a waxy, fat like substance found in our body. Some amount of it is naturally synthesized in our body and some is obtained from the food we eat. Cholesterol is needed by our body for the synthesis of certain hormones, vitamin D and is also required to build and maintain cell membranes. Cholesterol also helps in production of bile. When cholesterol exceeds the normal range then it is deposited in the walls of arteries increasing your risk of heart disease.