ShawnTO saidBack in the 40s studies suggested that people drink 8 glasses of fluids a day. Over the decades this information became misinformation, evolving into the 8 glasses of water a day we're so used to. It's like a bad case of the telephone game.
I found a website some time ago that dispells medical myths. I can't remember what it's called, but I'm sure it wouldn't be too hard to find on google.
Not quite true. The study in the fourties calculated you needed that much liquid, but didn't say you should drink it. They included water from your food as well.
After, it evolved into "you must drink it." And then, more recently, into "it must be water, nothing else counts, not even tea." I've heard various reports as to the reason behind that, the fear of milk and the bottled water lobby being among them. No idea what's the real reaosn.
This is one of those myths we've known is a myth for a long time. Every so often someone does yet another study proving it wrong in a different way and a couple years later it's forgotten.
Shockingly, we, like *every other mammal on the planet* will drink enough liquid if we drink when we're thirsty.