“Thirty-two patients with localized prostate [cancer]” were given three-quarters of a cup of canned tomato sauce every day “for 3 weeks…before their scheduled radical prostatectomy.” In their bloodstream, PSA levels dropped “by 17.5%.” … Also, free radical damage of the DNA in their white blood cells dropped by 21%.
– Tomato Sauce Vs. Prostate Cancer

Study: Tomato Sauce Supplementation and Prostate Cancer: Lycopene Accumulation and Modulation of Biomarkers of Carcinogenesis, Experimental Biology and Medicine, 2002