What is a potential danger of excess cholesterol in the human body?

The organ system most affected by high cholesterol is the circulatory system, or your blood vessels. When there is too much cholesterol in the blood, deposits can start to form inside the arteries. This is a serious problem, because over time, those deposits can grow and restrict the flow of blood to our vital organs. A blocked artery in the heart can cause a heart attack, while a blocked artery in the brain can cause a stroke.