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

Oversimplified, but I think of it like this. Narcan blocks opioid receptors, caffeine blocks adenosine receptors.