A Friend to Your Kidney! Yes! Hats off to the spirit of this fruit. It helps in flushing out kidney stones and prevents stone formation as well. Its richness in water, Potassium, Lycopene, and Nitric Oxide take care of your kidneys. Because of its diuretic nature, urine frequency is increased and aids in throwing out the stones that are churned and dissolved by the Potassium of the fruit. So, if your kidneys are fighting with stones, then don’t be a faint heart and opt watermelon to kick your stones out.