eli5: Since caffeine doesn’t actually give you energy and only blocks the chemical that makes you sleepy, what causes the “jittery” feeling when you drink too much strong coffee?
My understanding is that caffeine blocks the receptors that would normally grab onto the chemicals that, when roaming free in your body cause you to release adrenaline, so your body releases a whole lot more adrenaline than normal, and *that is* what you feel.
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