first off, as usual flex seems to be contradicting themselves from article to article. but what i really noticed is all these companies promoting nitric oxide compounds to enhance and keep a pump. do these things really work? i have a background with medicine and from what i remember long term stimulation of nitric oxide is very detrimental to the tissues. i wouldnt mind looking more pumped throughout the day especially right now while on low carbs but is this shit just a gimmick or what? any of you have experience or know someone who has used them?