> For this reason, caffeine isn’t technically a stimulant on its own... but a stimulant enabler: a substance that lets our natural stimulants run wild. This is

> For this reason, caffeine isn’t technically a stimulant on its own... but a stimulant enabler: a substance that lets our natural stimulants run wild. This is the bit I find fascinating and perhaps explains why some people are so sensitive to caffeine and others don't experience discernable effects. There are probably underlying physiological (and/or psychological) differences in individuals self-stimulant production, and caffeine magnifies those effects. Armchair scientist conjecture: I'd suspect that people who are considered "Type-A" are more strongly affected by caffeine as it enhances their natural, self-stimulating mechanisms (whatever those are).