does NOS fuel treatment work?

I saw some fuel treatment in a store the other day. It was some NOS fuel treatment that was supposed to give the car more HP, acceleration, and all that stuff. Does this work?

Ive heard any kind of additive is fake...

it's all snake oil as far as i'm concerned....

Additives work , if you have a way to measure the air/fuel lean to rich you could find out also finding out if it increases the compression when bieng used. Mostly nonsense , it would be in your head any difference it makes. Howd this post get in here btw?