Cholesterol is a fatty, plaque-like substance that can be found in the blood stream.
In high amounts, it can cling to the walls of blood vessels, harden, and partially or completely block the flow of blood. It is a leading cause in the development of heart disease. Also, there are two types of cholesterol, one good and one bad. The Mayo Clinic gives brief but informative information regarding what kinds of cholesterol are good or bad for the body and the signs and symptoms of high blood cholesterol. They also list the causes, risk factors, and how to treat and manage a high cholesterol level.