The title says it all really. If I drink a small Red Bull with 80 mg it makes me twitchy, but a 200 mg coffee barely even affects me.
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There’s also something called situational specificity of tolerance–essentially this means that over time, your body gets used to a stimulus delivered on a particular way, such as receiving caffeine from a cup of coffee. Meanwhile, your body will react more strongly to the same amount of caffeine delivered in another, novel form, like an injection or fruity tasking drink.
It’s been a while since I studied it, but could be something similar at play?
The way caffeine works is by blocking the signal to your brain that you are tired. Energy drinks also contain other ingredients that actually stimulate you including, usually, lots of sugar.
Theres more than caffeine in energy drinks. They also have a loooooot of sugar and supplements like taurine and ginseng (jury is still out on if those are actually stimulants in of themselves though)
Its also about the concentration. a mug of coffee has more total caffeine than a red bull, but the red bull may have more caffeine by volume depending on how you fix your coffee.
Because energy drinks also contain A LOT of sugar, a lot more than if you take your coffee with sugar which, in addition to caffeine, temporarily increase your energy levels before making you crash
Energy drinks have more sugar and other additives. All of those work together for faster energy burn.
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