why is coffee known to be dehydrating but it’s made with so much water?

Question

Aren’t you still drinking the water?

In: 3

Answer 1

Every actual study on this (I’ve read three, two with coffee and one with tea) has shown that it’s not dehydrating. It does cause an increase in GFR and overall urination, but that’s offset by the actual water in the coffee or tea.

Overall, coffee (and tea) provide net hydration.