If it blocks adenosine, why can’t it block it forever? What process stops it from working over and over?
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Coffee doesn’t actually get rid of the adenosine – it just stops your brain from noticing it for a while. To actually clear the adenosine, and other waste products that build up in your brain while awake, you need to sleep.
In other words, Drinking coffee is a bit like (temporarily) gluing your car’s fuel gage in place at the “full” mark. Maybe it stops your car from giving you annoying warning signals, but it won’t actually keep it running.
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