How Caffeine Keeps You Awake
The gist
Caffeine keeps you awake by blocking adenosine receptors in your brain, which prevents the feeling of tiredness.
Explain like I'm 5
Imagine your brain has tiny sleepy buttons that tell you to rest; caffeine covers those buttons so you don't feel sleepy.
Big picture
Understanding how caffeine works helps us use it wisely to boost alertness without disrupting sleep patterns too much.