It is not known with certainty since when watermelon (Citrullus lanatus) from bred, but according to historical records, this fruit has been known for thousands of years ago by the Egyptians (seen from the pictures that exist on the tomb of pharaoh hierogliph).
What's interesting about this watermelon fruit is not only the fruit are beneficial. Watermelon white part contains healthful compounds that act kidneys, such as preventing and destroy kidney stones.
Eating pieces of fruit will also increase the burning fat and glucose. At least it was proven in rats. Amino acid content in watermelon arginie effective in reducing fat in the mice who are overweight.
To be able to enjoy the maximum benefit, the selection of fresh watermelon is worth doing. To select it, staying pat the outside and listen to the sound that comes out. If the sound was contained then it is probably a good watermelon.