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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.
Eight glasses a day? We've been told we need to drink at least eight glasses of water a day, but Taylor says there's no scientific evidence to support this. Health professionals agree men's bodies need around 2.6 litres and women's around 2.1 litres of water a day (pretty much eight glasses a day).But it turns out you get some of this from other drinks and food, Taylor says. Approximately four glasses of water, or a litre a day, is obtained from the food that we eat.ight glasses a day? We've been told we need to drink at least eight glasses of water a day, but Taylor says there's no scientific evidence to support this. Health professionals agree men's bodies need around 2.6 litres and women's around 2.1 litres of water a day (pretty much eight glasses a day).