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The Harvard Health Letter published new water recommendations challenging the long-standing eight 8-ounce glasses-a-day rule, which they say werenât based on science, but instead an educated guess on what the body needs to stay hydrated.
With a heat wave gripping much of the country, many people are guzzling more water than usual to try to stay cool and hydrated. The convention wisdom says we should be downing eight glasses of water a day. But that number isn't based on any scientific studies, and doctors say it's not necessarily the best advice. A new article published in the Harvard Health Letter recommends drinking 30 to 50 ounces a day, an amount equal to about four to six glasses of water.