If a clot forms where this plaque is, it can block blood flow to part of the heart muscle and cause a heart attack. If the clot blocks blood flow to the brain, a stroke results. The liver makes most HDL and releases it into the blood stream. Medical experts think that HDL tends to carry cholesterol away from the arteries and back to the liver, where it is passed from the body. Some experts also think that HDL removes excess cholesterol from atherosclerotic plaques, slowing their growth.
Triglycerides are the major form in which fat occurs in nature.
They come from food and is also made in the body.