This 8×8 rule likely originated from a misinterpretation of an outdated recommendation from 1945 when the Food and Nutrition Board–now part of the Institute of Medicine (IOM)—suggested that a person consume one milliliter (ml) of water per each calorie of food consumed.
http://www.onemedical.com/blog/live-well/daily-water-intake/
If there’s one health recommendation that everyone seems to know, it would probably be to drink eight glasses of water a day, which is also known as the “8×8″ rule. It sounds logical enough: Since our bodies need water to function, not drinking enough of it prevents us from functioning optimally.
http://www.onemedical.com/blog/live-well/daily-water-intake/
Thus, an average diet of 1,900 calories per day would dictate an intake of 1,900 ml (approximately 64 ounces) of water. However, people interpreted this as a recommendation to drink 1,900 ml of pure water, forgetting the fact that water is also found in abundance in the other liquids and foods we consume.
http://www.onemedical.com/blog/live-well/daily-water-intake/
Next. Tags: 8 glasses of water a day, benefits of drinking water, daily water intake, dehydration, how much water should I drink, hydration, quirky questions, Steven Chang, why drink water.
http://www.onemedical.com/blog/live-well/daily-water-intake/
Best Answer: A couple of approaches attempt to approximate water needs for the average, healthy adult living in a temperate climate. * Replacement approach. The average urine output for adults is 1.5 liters a day. You lose close to an additional liter of water a day through breathing, sweating and bowel movements.
https://answers.yahoo.com/question/index?qid=20070108125448AAGn1gh
* Dietary recommendations. The Institute of Medicine advises that men consume roughly 3.0 liters (about 13 cups) of total beverages a day and women consume 2.2 liters (about 9 cups) of total beverages a day.
https://answers.yahoo.com/question/index?qid=20070108125448AAGn1gh
Food usually accounts for 20 percent of your total fluid intake, so if you consume 2 liters of water or other beverages a day (a little more than 8 cups) along with your normal diet, you will typically replace the lost fluids.
https://answers.yahoo.com/question/index?qid=20070108125448AAGn1gh
Pregnant women should have no more than 200mg of caffeine a day. One mug of instant coffee contains around 100mg of caffeine. High levels of caffeine can result in babies having a low birth weight, which can increase the risk of health problems in later life.
http://www.nhs.uk/Livewell/Goodfood/Pages/water-drinks.aspx
Today, the IOM liberally recommends an even higher volume of total daily water intake: 3.7 liters (15 cups) for the average adult male and 2.7 liters (11 cups) for the average adult female. If these numbers seem daunting, don’t worry.
http://www.onemedical.com/blog/live-well/daily-water-intake/
The average diet at the time was approximately 1900 calories, meaning you needed about 64 ounces of water per day. Now the Institute of Medicine sets general guidelines for total water intake. It recommends that women consume a total of 91 ounces (that’s about 2.7 liters) per day – from all food and beverages combined. For men, it’s about 125 ounces a day (or 3.7 liters). Depending on your diet, about 25% of the water you consume comes from your food. Most of us healthy folks get enough water in the foods and liquids we consume. That includes any liquid we drink – even caffeinated beverages like soda, coffee and tea.
http://www.doctoroz.com/blog/leigh-vinocur-md-facep/how-much-water-do-you-really-need
how many liters a day should a human drink
The average adult male should drink 3.7 liters per day and the adult female should drink 2.7 liters per day. The average adult male should drink 3.7 liters per day and for female 2.7 liters per day.