Tomatoes contain many nutrients, among them vitamins C and B complex and the minerals iron and potassium. Also in the mix are carotenoids. These include lycopene and beta carotene, which are converted into vitamin A by your body.
Lycopene gets high marks from researchers for its apparently potent antioxidant properties. Antioxidants are thought to neutralize harmful substances in the body called free radicals. These molecules, which result from normal cell metabolism as well as other causes, may increase your risk of cancer and cardiovascular disease.
(Source: Mayo Clinic website at www.mayoclinic.com)