[matznerd]

They are not some magic drug like Limitless, but they are closer to that than to placebos. Do you not notice a difference in your mental and physical state when you take caffeine? Caffeine is a Nootropic and it works, but Caffeine is just the tip of the iceberg.

[Tooluka]

For me caffeine is also closer to a placebo (I do know that it works, just weakly and randomly for different people). The major positive effect of it I think is drinking 100-200ml of hot drink. I feel the same after drinking coffee or any tea or some cacao mix by nestle. Drinking water a lot is very helpful for human brain, especially in cold and arid offices where we mostly sit without moving.