Thanks to new research, we understand that heart disease, or blocking of arteries, is caused by lipoprotein particles and not by cholesterol. Made of lipids and various proteins, lipoprotein particles are the principal way lipids like cholesterol are transported in the blood. These are the particles that can build up in a person's arteries and cause heart attacks.
Today, scientists have realized that determining your risk for heart disease is not as simple as just measuring your cholesterol. No matter how much cholesterol is being carried by these lipoprotein particles, it is the number of various lipoprotein particles present that contribute to heart disease.