Watermelon has wonderful properties for a natural skincare diet. The the green part of watermelon has a diuretic effect, that is, it helps the body get rid of liquid. Watermelon is also an alkalizing food. So even though it’s sweet, it helps make the body more alkaline. The caution watermelon that it is very sweet, and there’s a lot of sugar there. So you’ve got to be sure you’re not eating an excess amount sugar, or that you don’t have a problem with sugar, when you’re eating watermelon.