Watermelon
The good amount of potassium and magnesium that is present in watermelons is very beneficial in terms of preventing blood clotting. Potassium is considered a vasodilator, meaning that it releases the tension of blood vessels and arteries, thereby stimulating increased blood flow and reducing the stress on the cardiovascular system. The carotenoids present in watermelon also prevent hardening of artery walls and veins, thereby helping to lessen the chances of developing blood clots.