Tomatoes are rich in fiber, vitamins, minerals and phytonutrients. They are an excellent source of vitamin B6, C, and K, beta-carotene, biotin, niacin, potassium, phosphorus, calcium, iron, zinc and selenium, as well as many organic acids such as citric acid and malic acid, which define the characteristic flavor of the tomato. Due to its high content of antioxidants, organic acids and other essential nutrients, tomato is a real elixir of health.