All the comments about caffeine doing nothing... I used to have that problem, until I tried NOS. Not sure what the fuck it really does different than, like, Red Bull or Monster or Rockstar, but it perks me up and allows me to harness the power of hyperfocus on anything and not just things I like.
It's got the same 320mg for a tall can as Monster does. The one ingredient I can see on the label that NOS has that the others don't is something called "inositol." Which sounds like something they made up.
Could just be pladebo effect or a mood difference because I actually like the taste more. I got sick of guarana flavor back when Bawls was still around.