Ask your doctor to help you calculate your needed amount of calories. Staying at a healthy weight can help prevent many illnesses. Limit alcoholic beverages to less than one drink a day for women or two a day for men, if you drink at all. Reducing alcohol intake may cut your risk for many forms of cancer. Don't smoke or use smokeless tobacco.
Tobacco use is a culprit for many forms of cancer and for greater heart disease risk.
Limit cholesterol intake to less than 300 milligrams a day. Lessening intake will reduce your risk for heart disease. Nothing beats a healthy diet in keeping you healthy. Supplements may help, but before reaching for the supplements, reach for healthy foods. Your body will be the stronger for it.