Most research on resveratrol has been done on animals, not people. Research in mice given resveratrol suggests that the antioxidant might also help protect them from obesity and diabetes, both of which are strong risk factors for heart disease. However, those findings were reported only in mice, not in people. In addition, to get the same dose of resveratrol used in the mice studies, a person would have to drink more than 1,000 liters of red wine every day. Research in pigs has shown that resveratrol may improve heart function and increase the body's ability to use insulin. Again, however, these benefits have not been tested in people.