Watermelon

Watermelon is not only hydrating and refreshing, but it also contains the amino acid L-citrulline, which is converted to arginine and then utilized to create nitric oxide.

Citrulline supplements were found to help promote nitric oxide production after only a few hours in one short trial, however, it was noted that good health impacts may take longer. Meanwhile, a study of eight men found that drinking 10 ounces (300 ml) of watermelon juice for two weeks improved nitric oxide bioavailability significantly. According to a 2017 study, eating more watermelon raises nitric oxide levels, which may help athletes perform better and promote healthy blood pressure and blood flow. Watermelon has also been demonstrated to help with recovery after a workout.