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. Being overweight can raise triglyderides as well. Limiting fat and cholesterol intake in your diet can help lower blood cholesterol. Limiting fat, sugar and alcohol in your diet can help lower triglycerides as can losing weight if you are overweight.