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.
Besides water, it is full of nutrients; 1 cup of diced, fresh watermelon provides 21percent of the daily value (DV) for vitamin C, 18 percent of the VD for vitamin A, and significant levels of vitamin B6, lycopene, antioxidants, and amino acids.