However the 8 glasses per day has beed exposed as a myth by nutrional experts (see this CBC news article at http://www.cbc.ca/news/story/2003/03/14/water_glasses030314.html).

The source of this myth was traced back to 1945 as reported in the British Medical Journal Dec 24th, 2007;

“The advice to drink at least eight glasses of water a day can be found throughout the popular press.w1-w4 One origin may be a 1945 recommendation that stated: A suitable allowance of water for adults is 2.5 litres daily in most instances. An ordinary standard for diverse persons is 1 millilitre for each calorie of food. Most of this quantity is contained in prepared foods.w5 If the last, crucial sentence is ignored, the statement could be interpreted as instruction to drink eight glasses of water a day.w6″ link ( http://www.peertrainer.com/LoungeCommunityThread.aspx?ForumID=1&ThreadID=93407 )