I have been running KPV for two years and the honest summary is that the effect is smaller than the internet suggests and real.

I have started logging dose, time, and sleep because otherwise the anecdote is just a mood.

Cold storage, light protection, and a date on the vial. Boring, and it removes half the variables.

Baseline first. Without a baseline the after picture is decoration.

Animal data is much of what exists here and the human stuff is thin and small.

Willing to accept that my own experience is the weakest evidence in the room.