The cause of hardening of the arteries is high cholesterol.
Cholesterol is a waxy substance found in two places.
We need some cholesterol but excess cholesterol can build up on artery walls, cause the arteries to harden and increase the risk of a blockage. A blocked artery can lead to a heart attack or stroke. Triglycerides are another kind of fat found in the blood. High triglycerides can also increase the risk for developing heart disease. A diet high in fat, sugar or alcohol can raise triglyceride levels.