However, too much cholesterol in the blood can increase your risk of heart disease and stroke by leading to a buildup of plaque on artery walls. Eventually, the plaque can narrow the arteries (atherosclerosis), reducing blood flow. If a blood clot forms and blocks an artery to the heart artery, a heart attack can occur. If a blood clot blocks an artery to or in the brain, a stroke results.
The trick is to ensure that you have the right balance of cholesterol in the blood. If your cholesterol level is too high, making simple dietary and lifestyle changes – such as eating less fat and increasing physical activity – can lower your cholesterol, and therefore your risk of heart disease and stroke.