Enough With Drinking Water
Healthy people don’t have to drink nearly as much as they think
By Cathy Gulli
When it comes to water, there’s nothing clear about how much we need to drink or even what good it does us. Still guzzling eight 8-oz. glasses a day? There’s no scientific proof everyone requires so much. Urine should be colourless? That’s a sign you’ve chugged too much. Thirst means you’re already dehydrated? Not even close.
“I want to squash that notion. It’s baloney,” says Heinz Valtin, professor emeritus of physiology at the Dartmouth Medical School in Hanover, N.H., in a recent podcast produced by the American Physiological Society. He should know. His seminal 2002 study, “ ‘Drink at least eight glasses of water a day.’ Really? Is there scientific evidence for the ‘8 x 8’?” is often cited by other researchers investigating how much water we should consume daily. Now, many physiologists are debunking the most common assumptions about water intake. Valtin’s conclusion: healthy people who live sedentary lifestyles in temperate climates don’t have to drink so much.
