ELI5- If calories are units of energy how does caffeine give you energy if it doesn’t contain calories?

Question

ELI5- If calories are units of energy how does caffeine give you energy if it doesn’t contain calories?

In: Chemistry

Answer 1

Different type of energy.

1. Ability to do work. Like potential and kinetic energy. Chemical energy stored in things like carbs, fats, and proteins. Or the chemical energy in wood that you burn in a fire place. The potential energy of a bowling ball getting dropped from a skyscraper.

2. Feeling “energized.” Awake. Stimulated. Primed.

Caffeine does not contain digestible energy. But it is a stimulant that makes you feel more awake.