I think nicotine has been found to be the only substance that measurably increases performance.
Of course it is often countered by negative effects on respiration. Cannot find the study anymore, but it was very interesting.
I don't think you know about drug use of successful people because they know how to hide such consumption. But it is pretty clear that there is an enormous demand in the higher echelons of society.
A lot of the journals about positive effects on nicotine was sourced by tobacco companies in order to sell tobacco and has iffy science that hasn’t been reproduced.
Of course it is often countered by negative effects on respiration. Cannot find the study anymore, but it was very interesting.
I don't think you know about drug use of successful people because they know how to hide such consumption. But it is pretty clear that there is an enormous demand in the higher echelons of society.