Watermelon is known to help with erectile dysfunction somewhat.
"The more we study watermelons, the more we realize just how amazing a fruit it is in providing natural enhancers to the human body," said Dr. Bhimu Patil, director of Texas A&M's Fruit and Vegetable Improvement Center in College Station.
"We've always known that watermelon is good for you, but the list of its very important healthful benefits grows longer with each study."
Beneficial ingredients in watermelon and other fruits and vegetables are known as phyto-nutrients, naturally occurring compounds that are bioactive, or able to react with the human body to trigger healthy reactions, Patil said.
In watermelons, these include lycopene, beta carotene and the rising star among its phyto-nutrients - citrulline - whose beneficial functions are now being unraveled. Among them is the ability to relax blood vessels, much like Viagra does."