Who said we should drink 8 glasses of water a day? A scientific study reveals it

The recommendation seems to be to drink 8 cups of water water About two liters a day is not entirely correct, at least it is more than many people can commit to every day.

According to a new study, many people only need 1.5 to 1.8 liters a day, less than the normally recommended two liters.

“not scientifically supported”

“The current recommendation[cioè bere 8 tazze]it’s not scientifically supported at all,” said Yosuke Yamada of the National Institute of Biomedical Innovation, Health and Nutrition in Japan, and one of the first authors of the research, adding that “most scientists aren’t sure where this recommendation is coming from. “

One of the problems, according to the British newspaper, is that previous estimates of human needs for water It ignores that our food contains water which can contribute a large percentage of our total intake.

As Yamada explained, “If you only eat bread and eggs, you won’t get much water from your food. But if you eat meat, vegetables, fish, pasta, and rice, you can get about 50 percent of your body’s water needs.”

Hot and humid climates

Additionally, the study, published in the journal Science, assessed the water intake of 5,604 people aged 8 days to 96 years from 23 countries.

But the study revealed that those who live in hot, humid climates and at high altitudes as well as athletes and pregnant and lactating women need to drink more water.

(It is OK)

I also noticed that men between the ages of 20 and 35 had an average water “circulation” of 4.2 liters per day. This has decreased with age to an average of 2.5 liters per day for 90-year-old men, which obviously depends on the energy expended by the body.

For women between the ages of 20 and 40, the rate of water “circulation” in the body was 3.3 litres, and dropped to 2.5 liters by the age of 90.

drinking

Professor John Speakman of the University of Aberdeen, co-author of the research, said: ‘This study shows that the common recommendation of drinking 8 glasses of water – or around two liters a day – is probably too high for most people. “.

While there is no obvious harm from drinking larger amounts of water, the British newspaper says getting safe drinking water can be expensive in this day and age.