Extract that has weak antioxidant properties (Source: Free Radical Research
, February 2002, pages 217–233). Tomatoes contain lycopene, which is a significant antioxidant, but it is more bioavailable from tomato paste than from fresh tomatoes (Source: American Journal of Clinical Nutrition
, 1997, volume 66, number 1, pages 116–122). It can also be a potential skin irritant depending on what part of the tomato is used, but there is no way to know that from an ingredient label.