Shameless plug for my own variant of this, I'd appreciate suggestions.

Gwern didn't seem to notice much interesting about it: https://gwern.net/bacopa#quasi-experiment

does exciting mean good? i think i would describe caffeine pills as exciting, but largely because they make me rather anxious

@April ya basically, like makes me think hell yea this nootropic exists I'll tell my friends rather than causing a subjective feeling of excitement

@Tetraspace i find that caffeine pills are like adderall but the ratio of physiological distress to productivity is less good

and also i think you can build caffeine tolerance relatively quickly

but like they sure as hell do something to you that's indisputable

@April I can dig it, I'm a drinks coffee for breakfast (well, tea, but same diff) kind of caffeine consumer so I'm probably some amount tolerant already but can endorse it has effects