The body is about 60 percent water. If that doesn’t convince you of its importance in our health and well being, there’s something wrong. You’ve probably, like everyone else, been showered with the notion that you should drink at least 8 glasses of water per day—this remains sage advice, but do we really understand why?

When we don’t get enough water, we become dehydrated. While this might begin as simply having a dry mouth, it can quickly progress into lowered mental abilities and malfunctioning organs. The New York Times has a new article up explaining not only why water is so essential to life, but also some of the myths that surround it:

Human cells simply don’t function without water, and the body has evolved a finely tuned, complex system for making sure it has the water it needs under a wide range of conditions. In most cases, thirst is a reliable signal that more water is needed. A main job of the kidneys is to excrete just enough water to keep cells properly hydrated. However, contrary to myth, dark urine does not necessarily mean you’re dehydrated. Urine can be discolored by foods like asparagus, blackberries and beets.

Another popular myth: To moisturize skin, prevent wrinkles and produce a glowing complexion, you need to drink eight glasses of water a day. Drinking extra water doesn’t improve skin in people who are otherwise well hydrated. Better to use an emollient moisturizer to counter dry skin.

Like anything, there is a point of excess. While it’s more common for us to consume an inadequate amount, it is also possible to go overboard. Once you’re consuming enough to stay properly hydrated, there’s no advantage to drinking more. Check out the full post for more details.

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