The '8x8 rule' for hydration is widely cited but lacks scientific support. Individual needs vary; hydration should be tailored to personal factors.

Drink eight glasses of ... Many nutrition experts trace it back to a 1945 U.S. Food and Nutrition Board report that suggested people need about 2.5 liters of water daily. What most people missed ...

She is a nutrition, mental health ... Most of us are also familiar with the old adage: Drink eight glasses of water at 8 ounces daily. The eight-by-eight rule guides us to drink 64 ounces ...

So, if you weigh 150 pounds, that means you should be drinking 75 fluid ounces, a little over 9 eight-ounce glasses of water a day ... mental health, nutrition, and infectious disease.