Watermelon (Citrullus lanatus ) is a commonly consumed fruit native to southern Africa, and now cultivated worldwide. The color of the flesh can be red, pink, yellow, green, or white. It is eaten fresh in slices, in fruit salads, or as a juice. Watermelon contains various nutrients including ascorbic acid, β carotene, citrulline, and lycopene. Gochang is a small town in North Jeolla Province, South Korea. In Korea, especially, Gochang watermelon is nationwide in taste, flavor and sugar content because it is cultivated in the loess soil of a clean area containing abundant trace elements with s ufficient sunshine.

Watermelon contains many phytochemicals including phenolic acids, flavonoids, iridoids, and coumarins . Experimental results with hydrothermal extracts of watermelon showed the anti-oxidant activities.