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 is Low in Calories. The main benefit of watermelon to weight loss is that it is low in calories. It is made up of around 92% water and is very filling. Watermelon also contains some healthy nutrients such as vitamin C and lycopene, but is only 30 calories per 100 grams.