A bowl of cold watermelon soup is refreshing and is a very simple soup for one of those 'hot' days. Also, you will get all the wonderful nutrients and health benefits from the superfoods watermelon, lemons, mint, and stevia.Watermelon is great for cleansing, weight Loss, packed with nutrition, and is delicious too. It is an inexpensive way to help you cleanse your body and lose weight. One cup of watermelon has only 47 calories.