Actually, the very nature of a diuretic dictates that the body does not metabolize the water to nearly the same degree. Diuretics increase blood flow to the kidneys and prevent water from being reabsorbed.
Obviously, anything in moderation is not a bad thing. If you have a coke before you exercise, you're not going to faint, or even be dehydrated at all for that matter. But caffeinated drinks are not a substitute for water, and a diet of caffeinated drinks will have an effect on your body's hydration. As with anything, moderation is key.
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Le temps détruit tout
"Musicians are the carriers and communicators of spirit in the most immediate sense." - Kurt Elling
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