You can read more about the contents on the linked homepage, but it’s pretty much just caffeine and some other stuff, that should help (and they funnily enough claim everything from natural sources)

In my youth we just snorted caffeine pills, which work well enough

Cocaine isn’t really good for long term concentration.
Amphetamines would be better for that.

But… Let’s stay on topic o⁠:⁠-⁠)