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

Caffeine is a central nervous system stimulant. It doesn’t give you more energy per se, it makes you feel more energetic by speeding up your metabolism aka making your body burn more of the energy you have stored. Your body has stored energy already in forms such as fat and blood glucose.

Also coffee technically does contain like 2 calories haha, more if you add sugar.