All I could find:
"Nitric oxide or nitrogen monoxide is a
chemical compound with
chemical formula NHYPERLINK "/wiki/Oxygen"O. This
gas is an important
signaling molecule in the body of
mammals, including
humans. NO is an important messenger molecule involved in many physiological and pathological processes within the mammalian body both beneficial and detrimental. Appropriate levels of NO production are important in protecting an organ such as the liver from
ischemic damage. However sustained levels of NO production result in direct tissue toxicity and contribute to the vascular collapse associated with septic shock, whereas chronic expression of NO is associated with various carcinomas and inflammatory conditions including juvenile diabetes, multiple sclerosis, arthritis and ulcerative colitis."
"
GNC has begun to sell an oral "nitric oxide" product targeted for bodybuilders, with the claim that it dramatically increases muscle growth. The claim is grounded in an understanding of NO as being a vasodilator, and when taken prior to and after workouts, it enables muscles to receive more blood and therefore, more oxygen and nutrients. This is critical to maximal muscle exertion during training and recovery afterward. However, there are currently no valid studies supporting the hypothesis that orally ingested NO actually will cause vasodilation; additionally, while users of some supplements have claimed to experience results, these results are generally attributable to ingredients besides NO itself (proteins, creatine etc)."
Bodybuilding.com - NO Nitric Oxide Information and Product Listing! NO Nitric Oxide FAQ!
http://www.ar-r.com/shop/product_info.php?cPath=25&products_id=103
http://findarticles.com/p/articles/mi_m0801/is_2_66/ai_n15986653 <-------Supposedly how to get it into your body, good read/advertisement.
"Keep arteries open. The latest scientific buzz says you must be concerned about your "vascular function" -- how your arteries dilate and contract. Good vascular function lets blood flow smoothly to the heart and brain. And that is primarily accomplished by release of a chemical, nitric oxide, in the cells of blood vessel walls.
Many foods stimulate release of nitric oxide, says David Fitzpatrick at the University of South Florida Medical College. "That may explain why they are associated with less artery clogging," he says.
In a recent analysis of 150 foods,
Fitzpatrick identified the best blood-vessel dilators as: apple skin and pulp, peanuts (particularly with red skin), cinnamon, tea (green tea was one-third better than black tea), purple grape juice and red wine (particularly cabernet sauvignon). Fitzpatrick notes that the same chemicals in these foods also reduce LDL oxidation and blood-clotting."
As far as steroids go I have no clue. Hope this info helps.
Oh and I also came across some stuff about NO gas treatments for infants.