Vitamins A and C
Watermelon is also an excellent source of vitamins A (beta-carotene) and C, both antioxidant vitamins. The National Cancer Institute reports that these antioxidants have been found in some studies to prevent cellular damage that can lead to cancer, but that more human studies must be done to confirm this. The institute does, however, recommend eating a diet rich with fruits that contain antioxidants, which would obviously include.