Tomatoes often are thought to be a vegetable, though in reality they are a fruit. Whether you call them a fruit or a vegetable, tomatoes are a nutritional powerhouse and can provide immense health benefits when included in your diet plan. They contain a good amount of vitamins A, C, and K, folate and potassium along with thiamin, niacin, vitamin B6, magnesium, phosphorus and copper, all of which are necessary to maintain good health. The best part is that tomatoes are naturally low in sodium, saturated fat, cholesterol and calories. They go well in salads and sandwiches, as gravy for vegetables, and in sauces and soups.