ELI5- If calories are units of energy how does caffeine give you energy if it doesn’t contain calories?
In: Chemistry
Caffeine does not supply your body with chemical energy, it gives your body and brain the sensation of wakefulness. Caffeine blocks certain receptors that regulate how tired we feel, causing us to feel more energetic than we actually are. So while we might be so tired that we would normally want to lie down and stop moving, it tricks us into feeling like we have enough energy to do more active tasks.
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