is low in saturated fat and dietary cholesterolis low in sodium (if following the low-sodium version)is rich in potassium, magnesium, calcium, protein, and fiberemphasizes fruits, vegetables, and low-fat dairyincludes whole grains, fish, poultry, and nutslimits red meat, sweets, and sugary beverages.These components seem to work synergistically to reduce risk factors for heart disease.