Eight glasses of water a day: Hydration hoax?

The fact that we must drink eight glasses of water a day is one of modern society's most accepted conventional wisdoms. But what is it based on?

Water By Alexandra Spunt for NoMoreDirtyLooks.com

I’m perennially dehydrated. Not a doctor or alternative health practitioner or facialist has told me otherwise.

In my twenties, I even had a kidney stone—which I blame squarely on a Diet Coke addiction (and a water aversion). So it’s a little ironic for me of all people to dare question one of modern society’s most accepted conventional wisdoms: That we must drink eight glasses of water a day. No exceptions.

But hear me out on this, because I’m not actually proposing that we drink less.

When Siobhan and I went in search of studies to support this eight glasses business while researching the book, we turned up a whole lot of nothing. And we’re not the only ones.

In a 2009 Scientific American article, they reported that “Heinz Valtin, a retired professor of physiology from Dartmouth Medical School who specialized in kidney research and spent 45 years studying the biological system that keeps the water in our bodies in balance” looked for the same. From the piece:

“But after an extensive search in 2002 for the origins of what is commonly referred to as the “8 x 8″ guideline and a review of associated health claims, he reports finding no scientific evidence supporting the notion that healthy individuals need to consume large quantities of water.”

Keep reading to find out more…

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