Who said we should drink 8 glasses of water a day? Scientific study reveals

The recommendation seems to be to drink 8 cups of water water Approximately two liters per 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[i.e. drinking 8 cups]is 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 are not sure where this recommendation comes 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 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

In addition, the study, published in the journal Science, assessed the water intake of 5,604 people between the ages of 8 days and 96 years from 23 countries.

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



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

As for women between the ages of 20 and 40, the rate of “circulation” of water in the body was 3.3 liters, and it decreased to 2.5 liters upon reaching the age of 90 years.


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

While there is no obvious harm from drinking higher amounts of water, the British newspaper says that obtaining safe drinking water can be expensive, these days.

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