Caffeine has almost no calories, but it gives us energy. Where does this energy come from? Is caffeine making the body use its stored fat?

Question

Caffeine has almost no calories, but it gives us energy. Where does this energy come from? Is caffeine making the body use its stored fat?

In: Chemistry

Answer 1

I’m sure this has already been said in the comments, and I didn’t read a single one because I felt like explaining it. Caffeine is an adenosine antagonist. That means it blocks adenosine.

Adenosine is a neurotransmitter that controls your sleep drive. It builds up while you’re awake and makes you feel tired. Drink some coffee and the adenosine gets blocked and you feel more awake.