Eight glasses of water a day, good for you or just an urban legend? Discover Magazine investigates:
Balderdash, says a new review of the scientific literature by kidney gurus Dan Negoianu and Stanley Goldfarb from the University of Pennsylvania. They found that for the average, healthy individual, there is no evidence that increased water intake benefits organ functioning, appetite, headaches, skin tone, or substance clearance from the kidneys—and the origin of 8×8 is a mystery. The human body didn’t evolve a chronic thirst—it evolved a great capacity for maintaining proper water balance in the face of variable intake.Dr. Fuhrman actually emailed me this one, here’s what he had to say about all the water hype. Check it out:
These findings support an earlier study by Heinz Valtin from Dartmouth, which found no support for 8×8, and debunked a few other myths. He found that dark urine does not mean dehydration, caffeinated beverages “count” as fluid intake, thirst doesn’t mean “it’s too late,” water doesn’t prevent (or help) constipation, cancer, or heart disease.
If you need all that water, you must be eating an unhealthy diet. A healthy diet, high in fruits and vegetables and low in salt is full of water already.And you won’t be peeing as much either—yippee!