While it is true that caffeine has a moderate diuretic effect, the amount of water in your coffee or tea outweighs
any dehydrating effect of caffeine.
If you are drinking coffee regularly, you may need to sip even more water throughout the day to make up for
the dehydrating effects of caffeine.
Not exact matches
For example: If you drink a 16oz coffee, the
caffeine will cause about the same amount
of water to be eliminated from the body, thus not producing a
dehydrating effect.
And when dry cabin air is paired with the diuretic
effects of caffeine and alcohol, it's easy to end up
dehydrated.