Why can too much cholesterol be bad for you?

Cholesterol is a natural fatty subtance that is found in many foods such as dairy produce, eggs and meat. it is also produced naturally in the body. High levels of cholesterol in the blood can sometimes collect on the inside the arteries, like the fur inside a kettle. This gradually reduces the blood flow and can lead to the formation of a clot that may break off and block smaller arteries. Sometimes an artery becomes almost completely blocked by these cholesterol deposits. It becomes so narrow and rigid that it can not expand to let enough blood to pass through. This kind of blockage usually happens in the legs, and is a common result of cigarette smoking.