Eight glasses of water a day has long been held as the traditional standard of healthy water consumption. It is not that straightforward, however, as noted by experts at the Mayo Clinic. Individual water needs depend on several factors.
Function
Water makes up about 60 percent of the average body weight, according to experts at the Mayo Clinic. Water is essential for carrying nutrients to cells and flushing toxins from organs. Even mild dehydration can lead to fatigue.
Water Needs
Drinking two liters of water a day generally replaces water lost through body functions, explains the Mayo Clinic. Another 1 to 3 cups of water may be needed after exercising, and more after prolonged exercise. Pregnancy, certain illnesses and hot weather also create a need for more water.
Specifics
The Institute of Medicine of the National Academy of Sciences recommends about 2.7 liters daily for women and 3.7 liters for men, including water intake from all beverages and foods. Water intake from foods generally accounts for about 20 percent.
Common Sense
Most healthy people consume enough water simply by drinking it when they are thirsty, according to the Institute of Medicine of the National Academy of Sciences.
Considerations
Medical experts at the Mayo Clinic also note that water intake is probably adequate if you drink enough fluid to seldom feel thirsty and produce about 6 cups of clear or light yellow urine every day.
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