The many health benefits of tomatoes. Can be attributed to their wealth of nutrients and vitamins, including an impressive amount of vitamins A, C, and K, as well as significant amounts of vitamin B6, folate, and thiamin. Tomatoes are also a good source of potassium, manganese, magnesium, phosphorous, and copper. Tomatoes also have dietary fiber and protein, as well as a number of organic compounds like lycopene that also contribute to the overall health benefits that tomatoes can confer to our health.