POV: we’re dancing at the party but I’m trying to explain why caffeine makes you feel awake... 🤨 Caffeine blocks the “sleepydust” receptor in your brain. (“sleepydust” is adenosine, a neurotransmitter). Usually, when adenosine activates its receptor, it makes you feel more sleepy. However, when caffeine is blocking that receptor, adenosine can’t it to make you feel sleepy, even though the adenosine is still hanging around in your brain. Eventually, the caffeine unblocks from the receptor and al