Caffeine increases levels of alertness. It works by binding to the adenosine receptors and inhibits adenosine absorption. Eventually the caffeine wears out and

Caffeine increases levels of alertness. It works by binding to the adenosine receptors and inhibits adenosine absorption. Eventually the caffeine wears out and all the adenosine you didn’t absorb because of the caffeine will hit you later and can cause you to “crash”/feel really tired later in the day. Overall I agree with you, caffeine is doesn’t seem to have no downsides (in moderation) Andrew Huberman has some great episodes on caffeine and I totally recommend listening to those if you want to understands the effects and how to leverage them