Drinking Water Myths Tough to Swallow
Health benefits, need to drink more unclear
By Ambreen Ali,  Newser User
Posted Apr 22, 2008 3:30 PM CDT
Workouts, unless you're running a marathon, are not intense enough to dehydrate you. That only happens when you lose 2% of your body weight in water.   (Shutter stock)
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(Newser) – With high-end restaurants offering diners tap water and concerns about the health and environmental impact of plastic bottles at an all-time high, NPR sets the record straight about some common myths related to drinking water:

  1. Not only is drinking 8 glasses daily not necessary, "nobody really knows" where that advice originated, says one expert.
  2. Water  doesn't help the kidneys filter toxins.

  1. The fluids already in you dwarf the amount of water in a few glasses, so any benefit to skin is minor.
  2. It may be helpful in making dieters feel full, but extra water doesn’t lead to weight loss.
  3. True dehydration during a workout requires a lot more water loss than a recreational athlete is likely to experience.