Quote from article:

“These experiments show indirectly that mammalian cells can reduce nitrate to nitric oxide,” Panesar says. Nitric oxide acts as a hormone in the body, inhibiting hormone synthesis in the testis or causing vasodilation, he adds. For instance, nitric oxide action is the mechanism behind the anti-impotence drug, Viagara, but too much nitric oxide during early developmental stages appears to depress testosterone synthesis...

http://www.mindfully.org/Pesticide/2...pter1may03.htm

Wouldn't the nitrate conversion principal that the article talks about be the same with all the NO products on the market?