Health Check: does caffeine cause dehydration?

For a long time people have been told that caffeine is a diuretic. For some, this translates into advice to avoid or remove caffeinated beverages from the diet of people at risk of dehydration, or during periods of extreme summer heat.

While possibly well meaning, this advice is wrong.

By definition, a diuretic is a product that increases the body’s production of urine.…

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