A single serving of freshly diced watermelon contains 9.42 grams of sugar and has 0 grams of sugar alcohol. Watermelons have only 46 calories per serving and are made up of roughly 92 percent water. They are highly nutritious, rich in antioxidants and provide many health benefits.
The flavonoids, triterpenoids and carotenoids are phenolic compounds found in watermelons that provide the body with antioxidant and anti-inflammatory health benefits. Watermelons are rich in an amino acid called citrulline, which may provide some cardiovascular benefits in large quantities. The modest amount of protein, fiber, zinc and iron found in watermelons provides the body with additional health benefits.