Not the sweetest or your favorite fruit but trust me, watermelon is very effective in fighting high blood pressure. Watermelon contains citrulline an amino acid which is very important in lowering blood pressure. This amino acid produces some amount of nitric oxide that relaxes the blood vessels and so the arteries become more flexible. Flexible arteries will allow effective flow of blood throughout the body and hence reducing blood pressure. A research which was carried on people with obesity, revealed that watermelon reduced blood pressure in their ankles and the main artery in their arm. Another research was conducted on animals and animals that took watermelon had better health compared to those who didn’t. Take one watermelon a day and your blood pressure will reduce within no time.