How much water do you really need to drink each day? Spoiler: It's not 8 glasses.

We all know that humans need water to survive, but how much just plain water do we actually need to consume each day to be healthy?

If your instinct is to say 6 to 8 glasses of water a day, you’re not alone. For many of us, that figure has been ingrained into us since we were kids by health class…

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