Watermelon is a fruit that originated in South Africa. Originally, watermelon was a wild type of fruit plant, but the species has been cultivated and spread throughout the world. There are about 1200 species of watermelon grown today. The largest producer of watermelon is China. Watermelon contains about 92% water (hence the name) and very low fat. There is a large sugar component (about 6.2 grams per slice), so people who are diabetic or glucose intolerant need to be careful eating large quantities. Watermelon is a good source of Vitamin C and Lycopene. For those people trying to lose weight, watermelon should be on the menu as it contains fiber and a natural diuretic. Try substituting a cold slice of watermelon for desert or a snack.