Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Cholesterol is an organic chemical substance which is classified as a waxy steroid of fat. It is essential to mammalian cell membranes so as to establish proper membrane permeability and fluidity. Cholesterol is important and necessary for human health but high levels of cholesterol in the blood have been linked to damages of arteries and cardiovascular diseases... Learn more about cholesterol, cardiovascular disease and coronary disease with the help of this book.