Hyperlipidemia is a condition in which there are high levels of lipids in the blood. It is more commonly known as high cholesterol. The two major types of lipids found in the blood are triglycerides and cholesterol.
Cholesterol is a fatty substance that travels through your bloodstream on proteins called lipoproteins. When you have too much cholesterol in your blood, it can build up on the walls of your blood vessels and form plaque. Over time, plaque deposits grow larger and begin to clog up your arteries, which can lead to heart disease, heart attack, and stroke.