5 doctors weighed in: Does alcohol thin the blood? 5 doctors weighed in Want a second opinion? Blood actually doesn't get thinned.  what we call blood thinners are agents that decrease the ability of the blood to clot, usually used in people whose blood clots excessively.
However, due to its very high water content, the same amount of watermelon that provides us with 16% of the DRI for vitamin C only costs us about 46 calories, or about 2% of our total daily calories on a 1800-2000 calorie diet.
Watermelon lives up to its name big time. This colorful, refreshing fruit, with its dramatic light-and-dark-green rind and its juicy pinkish-red interior, is actually over 91 percent water, which makes it super low in calories: 1 cup of diced watermelon contains a mere 46 calories. Watermelon has almost no fat or protein.