watermelon is rich in vitamins a, c, b6, b1 as well as potassium. it also contains lycopene which gives certain produce its red hue and more importantly is being looked at for its potential ability to prevent certain types of cancer. watermelon contains an amino acid known as l-citrulline which studies have shown can be beneficial in improving circulation by relaxing blood vessels which can aid in preventing post work out muscle fatigue if consumed prior to physical activity.