Why is a high cholesterol level unhealthy?
While some cholesterol is needed for good health, too much cholesterol in your blood can increase your risk for heart disease, including heart attack or stroke.
If you have high cholesterol, your body may store the extra cholesterol in your arteries. Your arteries are blood vessels that carry blood from your heart to the rest of your body. Buildup of cholesterol in your arteries is known as plaque. Over time, plaque can become hard and make your arteries narrow. Large deposits of plaque can completely block an artery. Cholesterol plaques can also split open, leading to formation of a blood clot that blocks the flow of blood.
If an artery that supplies blood to the muscles in your heart becomes blocked, a heart attack can occur. If an artery that supplies blood to your brain becomes blocked, a stroke can occur.
Written by familydoctor.org editorial staff