You need more than 40 different nutrients for good health and no single food can supply them all. Today's food supply makes it easy to eat a wide variety of foods whether or not you are buying fresh foods to cook, taking advantage of ready-prepared dishes and meals or buying "take-away" foods. Balance your choice over time! If you have a high-fat lunch, have a low-fat dinner. If you eat a large serving of meat at dinner one day, perhaps choose fish the next day.