Are you waterlogged or dehydrated?

“….and don’t forget to drink 8 glasses of water per day” has been admonished without question for the last 70 years. The evidence to back up the requirement is empty despite the progression of bottled water that started in 1977 with Perrier to the craze that is present today. As Aaron E. Carroll discusses in his article in TheUpshot, there is a story here.