Why You Don't Need 8 Glasses of Water a Day

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(via TED) You know the old rule that you need to drink eight glasses of water every day? It's simply a myth, says Dr. Jen Gunter. In this episode, she explains the amazing way your kidneys keep your system in balance -- and how you can really tell if you're dehydrated. Want to hear more from Dr. Gunter? Check out her podcast Body Stuff, from the TED Audio Collective.



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