According to WHO report, the main cause of death in modern day and age is because of ischemic heart disease. Ischemic heart disease just means blocking of veins of aorta by sticky substance called plaque. Plaque is mainly caused by cholesterol collecting in wall of aorta. It gets collected due to eating high cholesterol food like excess oil or butter. Excess oil and butter is also the main reason of obesity. When we become obese and cholesterol gets collected in veins of aorta, we run the risk of heart attack and death. So we should choose balanced diet which have just the required amount of cholesterol and also exercise a lot so that we can burn the cholesterol and avoid risking the blockade of blood flow from aorta by cholesterol.