At some point in our lives we've heard that we should drink around six to eight glasses of water a day. It's a recommendation that's rarely challenged and championed by many health advocates. But where exactly do the numbers come from and why? Dr. Margaret McCartney, a general practitioner from Scotland, is challenging the 8-glasses-a-day rule and recently published her … [Read more...] about Through the Drinking Glass: Are You Drinking Too Much Water a Day?