Andrew Huberman· PhD
If you are ingesting caffeine, whether or not it's from tea or coffee, I highly recommend increasing your non caffeine fluid intake about two to one for every volume of caffeine. So in other words, if you have a 6 ounces or 8 ounces of coffee, you're gonna want 12 to 16 ounces of fluid, ideally fluid with electrolytes, or a little pinch of salt in order to offset that dehydration.