Healthy blood pressure, the prevention of asthma, digestive support and protection against damage from free radicals are potential health benefits of watermelon juice, according to Medical News Today. Watermelon juice is rich in electrolytes, which help keep the body hydrated and prevent heat stroke.
Watermelon is a nutrient-dense food, with vitamins C, A and B-6, choline and amino acids. Watermelon also contains antioxidants and lycopene. Two cups of watermelon contain 25 percent of the daily value of vitamin C, based on a 2,000-calorie diet.
The high amount of vitamin C and other antioxidants in watermelon juice may reduce the risk of certain cancers, including prostate cancer. Vitamin C also supports the immune system and is necessary for the body to produce collagen, which gives structure to hair and skin. Similarly, vitamin A helps the body maintain moisture in skin and hair while fostering the healthy growth of new elastic and collagen cells.
Citrulline and arginine, two amino acids present in watermelon juice, alleviate muscle soreness, improve blood flow, lower blood pressure and reduce hypertension and the accumulation of excess fat, states LiveScience.com. Lycopene protects cells from damage and helps to lower the risk of heart disease. Lycopene is also an inhibitor for certain inflammatory processes, while choline, a water-soluble nutrient in the family of vitamin B, reduces chronic inflammation.