Cholesterol is a waxy, fat-like substance that is found in all cells of the body. Your body needs some cholesterol to work the right way. Your body makes all the cholesterol it needs. Cholesterol is naturally present in cell walls or membranes everywhere in the body, including the brain, nerves, muscles, skin, liver, intestines, and heart,  is needed to make vitamin D and some hormones, build cell walls, and create bile salts that help you digest fat. 

Blood is watery while the cholesterol is fatty. Cholesterol is carried in small packages called lipoproteins in order to travel in the bloodstream. The small packages are made of fat on the inside and proteins on the outside. There are two types of cholesterol, one is the good cholesterol known as high density cholesterol (HDL) and the other is the bad cholesterol known as low density cholesterol (LDL). The good cholesterol HDL, should be in levels of minimum 40md/dL or more and the bad cholesterol should be less than 200mg/dL.The bad cholesterol is the cholesterol responsible for causing dieses including clogged arteries and can provoke a coronary heart disease.

LDL cholesterol leads to a buildup of cholesterol in arteries. Therefore, the higher the LDL level in your blood, the greater chance you have of getting heart disease. Whereas HDL carries cholesterol from other parts of your body back to your liver. The liver then removes the cholesterol from your body. Therefore, the higher your HDL cholesterol level, the lower your chance of getting heart disease.