You’ve heard it a million times: eight glasses a day, right? Well, spoiler alert—that number is basically a wild guess from 1945. A study back then suggested we need about 64 ounces daily, but that included water from food. So unless you’re chomping on celery all day, take that rule with a grain of salt (and maybe a slice of lemon). Your actual needs depend on you—your body, your sweat, your coffee habit.
Here’s the real kicker: thirst is a liar. By the time your brain yells “I’m thirsty!”, you’re already mildly dehydrated. (Classic, right?) So waiting for that dry-mouth signal is like ignoring your car’s gas light until you’re stranded. Instead, listen to your pee—yes, really. Pale yellow means you’re golden; dark amber means you’re running on fumes.
