Tomatoes, like potatoes, capsicums and eggplants belong to the nightshade family and are one of the world's most widely used vegetable crops - though technically the tomato is a fruit. Tomatoes are a good source of Vitamin C, beta-carotene, folate, and potassium. Vine-ripening implies that the tomato is picked from the vine at the 'breaker stage'. Or, when the tomato begins to change color so it is at the optimum quality when the consumer receives it.