hello.
i think i'd drop a line about l-citrulline.
I am aware there ARE a few supposedly high-tech, hyped up compounds out there.
As far as my knowledge goes, the NO trick lies in the conversion citrulline-arginine.
I opted for simple l-citrulline i bought at BAC for pennies.
I discarded for now "brekthrough" supplements going down the avenue creatine went, with various salts ( malate, citrate...) because buffering a compound with ages old food additive malic acid means little to nothing & yea, tell me a buffered compound is 40x better than its components alone.

At the end of my first bottle, i can CLEARLY see increased vascularity ( ex veins surface under my hands' skin, biceps, etc ) and good muscle pumps.
I'm NOT talking Dorian-like gains & i'm not making it up.
Definitely worth its price, though.
If you want to try a NO product yet don't want to go for fancy labels & food additives paid in gold, try l-citrulline.
This said i may NOT mind a formula with malic acid in it, like OX, *if* i find a rock bottom price & i don't have to pay for it.