Eli5 How does caffeine dehydrate you?

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We all know that caffeine dehydrated you but how does it exactly work? For instance. If I drink an energy drink and immediately follow that with water does the water get absorbed properly or is there some sort of caffeine window?

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Anonymous 0 Comments

Drinking normal coffee doesn’t dehydrate a normal person. The mild diuretic effect of caffeine will be more than offset by the water in the coffee in the first place. This is a made up outcome.

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