Here’s a test: measure your pee output. No, seriously. If you go every two hours, you’re good. If you go once a day, you’re a cactus.
A simple rule: drink when you’re thirsty, stop when you’re not. Your body invented thirst billions of years ago.
Trust it more than your Fitbit. That thing lies about your steps, anyway.
B Fit B Hydrated - The Braden Aboud Memorial Foundation
The Weird Exception
Older people lose their thirst reflex. So if your grandpa hasn’t had water since 1998, bring him a glass. He might be a human jerky stick.
Also, if you exercise, you need more. Duh. But don’t chug. Sip like a Victorian tea party.
Sports drinks are mostly sugar water. Unless you’re running a marathon in the Sahara, just drink the free stuff from the tap.
