High blood sugar levels are the major reason why men experience erectile dysfunction. Pomegranate juice acts to produce nitric oxide, the same agent that Viagra activates. [International Journal Impotency Research Sept 1, 2016] Pomegranate is an excellent agent to calm prostatitis as well. [Journal Chinese Medicinal Materials 2009] Pomegranate juice is much more potent than grape juice, or red wine in activating nitric oxide, the transient gas that dilates (widens) blood vessels and results in erections for males. [Nitric Oxide Sept 2006]