Eddy Edson
Well-Known Member
- Relationship to Diabetes
- Type 2
No apparent scientific basis for "Eight glasses a day" etc etc - once again just things that people say because people say them. The best general advice for most people seems to be: drink when you're thirsty.
Big new study from the int'l IAEA Doubly Labeled Water Database Consortium:
Newsweek story: https://www.newsweek.com/newsweek-com-how-much-water-body-actually-needs-1761727
"The eight glasses per day dogma overestimates the water needs for most people," Herman Pontzer, a professor at Duke University who worked on the study, told Newsweek. "It's not based on any real evidence, as far as we can tell. It's more of a marketing slogan that seems to have caught on. Also, it doesn't need to be pure water. Other beverages count toward our water intake as well."
...
"The variation in water turnover is incredibly large. The low end for adults is around 1.5 liters per day, and the upper end is around 6 liters per day.... Even within an individual, if the mean air temperature is 30 Celsius, water turnover is 1.0 liters per day more than at 10 Celsius.
"A one-size-fits-all approach is a big issue both between and within individuals,"
...
The researchers identified a range of different environmental and lifestyle factors that affect water turnover in an individual. "We found that age, sex, body size, physical activity level, occupation, athletic status, pregnancy, living altitude, air temperature, humidity and socioeconomic status determine a person's water turnover," Yamada said.
...
The equation was produced to help inform strategies for global water access and for planning for future water needs. But Pontzer said that individuals could rely on more intuitive ways to measure water requirements.
"The best way to track the water you need to drink each day is to listen to your body," he said. "If you're thirsty, drink something, preferably water or other healthy drink."
Big new study from the int'l IAEA Doubly Labeled Water Database Consortium:
Newsweek story: https://www.newsweek.com/newsweek-com-how-much-water-body-actually-needs-1761727
"The eight glasses per day dogma overestimates the water needs for most people," Herman Pontzer, a professor at Duke University who worked on the study, told Newsweek. "It's not based on any real evidence, as far as we can tell. It's more of a marketing slogan that seems to have caught on. Also, it doesn't need to be pure water. Other beverages count toward our water intake as well."
...
"The variation in water turnover is incredibly large. The low end for adults is around 1.5 liters per day, and the upper end is around 6 liters per day.... Even within an individual, if the mean air temperature is 30 Celsius, water turnover is 1.0 liters per day more than at 10 Celsius.
"A one-size-fits-all approach is a big issue both between and within individuals,"
...
The researchers identified a range of different environmental and lifestyle factors that affect water turnover in an individual. "We found that age, sex, body size, physical activity level, occupation, athletic status, pregnancy, living altitude, air temperature, humidity and socioeconomic status determine a person's water turnover," Yamada said.
...
The equation was produced to help inform strategies for global water access and for planning for future water needs. But Pontzer said that individuals could rely on more intuitive ways to measure water requirements.
"The best way to track the water you need to drink each day is to listen to your body," he said. "If you're thirsty, drink something, preferably water or other healthy drink."
