Cholesterol is a normal constituent of the blood. It is found in the cell membranes and layer of the skin. It is used by the adrenal and the sex glands to form the hormones. Cholesterol has a proper and regular function to be performed in the body's chemical process.
Excess cholesterol is derived from the saturated fats we consume through our food. Fatty deposits containing large quantities of cholesterol lead to the narrowing and hardening of the arteries (blood vessels). This condition is known as arteriosclerosis. We know that the excess fat gets deposited in the surface of the heart. This is an overload on the heart. Excess fat is also a living tissue and hence requires blood supply just as any other tissue in our body. An increase in body fat necessitates a corresponding increase in the number of small blood vessels for the additional blood supply or else the heart can not but over work to meet the need. The heart of an obese person functions under the handicap of a superfluous layer of fat. Overweight also hinders lung function, resulting in respiratory problems. Apart from heart & lungs, the liver & kidneys are the other vital organs that get affected due to obesity.