All blood cells contain a fatty substance known as ‘Cholesterol’. Cholesterol can be produced in your liver as well as can enter your body through the food you eat. An increase in cholesterol levels can be due to the consumption of foods containing high saturated fat. Cholesterol is essential to form cell membranes and hormones, but an excess of cholesterol is bad for our health because excess cholesterol moves through the bloodstream which then gets deposited as plaque on the side of artery walls. These plaques are responsible for the narrowing of the blood vessels and become a major reason for heart attacks.