Cancer is a leading cause of death in the US, killing 1 in 4 Americans each year. Diet may be linked to about one-third of cancer cases. Tomatoes contain the phytochemical lycopene, which research shows may reduce cancer risk, especially prostate cancer risk. Lycopene is absorbed better when tomato foods are cooked with oil. The document recommends including several servings of tomato foods like fresh tomatoes, canned tomatoes, tomato sauce, and tomato soup each week to help decrease cancer risk.