Lycopene, found primarily in tomatoes is a member of the carotenoid (which includes beta-carotene)is a potent anti-oxidant. Numerous studies including a Harvard University study have shown it has the ability to inhibit the growth of certain prostate and breast cancer cells. The men who had the greatest amounts of lycopene (6.5 mg per day) in their diet showed a 21% decreased risk of prostate cancer compared with those eating the least. In Europe, researchers have found a statistically significant association between high dietary lycopene and a 48% lower risk of heart disease. Lycopene supplementation has also boosted immune function in the elderly.