Studies suggest that consuming watermelon seeds may help increase testosterone levels in the blood (30).
Take a large knife and cut one inch off the top and bottom of the watermelon. Then, cut it in half crosswise. Place the cut side of the watermelon on a carving board and cut off the ring (using the knife) and discard it. Now, cut the fruit vertically into one-inch thick slices. Work with one slice at a time – gently break the watermelon along the vein of the seeds. Scrape the seeds off and transfer the seedless watermelon portions to a bowl. Repeat with the other slices.