Does caffeine make us have more energy even though it doesn’t have many calories? Does it make our bodies use up fat that is already stored? Where does the extra energy from caffeine come from?

Question

Does caffeine make us have more energy even though it doesn’t have many calories? Does it make our bodies use up fat that is already stored? Where does the extra energy from caffeine come from?

In: 2234

Answer 1

It doesn’t. All it does is block the signals telling you that you’re tired. It’s like your body is trying to tell your brain that you have no energy left, but your brain just had the volume cranked right up on the radio. Once the music stops, your brain suddenly hears the message getting through and realises that you’re screwed.

Or maybe you could think of it as being like putting a bit of tape over your fuel gauge and drawing an arrow on it that points to “Full”.