water is vital for the human body. If we take too little of it, the metabolism is disturbed and our physical and mental performance goes back. But how much water should we drink? Experts have argued for a long time. According to the latest findings, one should not rely on recommendations that advise to two or three liters a day.
Too low a fluid intake is unhealthy
When a person drinks too little, the fluid balance becomes unbalanced. This compromises health. It is known that fluid loss can lead to physical and mental discomfort. Concerned persons are among others concentration problems, mouth dryness, fatigue, lack of appetite or constipation. That the human body needs sufficient fluid to stay healthy is therefore no question. It is controversial, however, how much water per day is really healthy. The results of a new study make the answer to the question fairly simple.
Always drink enough
Health experts like to point out that you should always drink enough water, especially during heat. But there are many doctors who are not in agreement about this. It is called at least two liters a day, then again three or more. Australian scientists now come to the conclusion that quantity recommendations do not bring much anyway. According to the researchers at Monash University in Melbourne, you should simply drink when you are thirsty.
Automatic weakening of swallowing reflex
The team has shown in its study that the human body has a reliable mechanism that prevents us from drinking too little or too much. According to the study, whose results have been published in the journal "Proceedings of the National Academy of Sciences"( PNAS), the feeling of thirst is that we do not drink too little, and a slowing of the swallowing reflex prevents people from drinking too much.
"The swallowing reflex is automatically weakened when enough water is drunk," explained co-author Michael Farrell in a messageof the university.
Deaths from excessive fluid intake
As demonstrated by magnetic resonance tomography( MRI) examinations, the whole is controlled by certain areas of the brain. It is exhausting to drink too much without thirst. And that's just as well. As well as drinking too little, too much drinking can be harmful to health.
An excessive fluid intake can lead to nausea and convulsions. It can even be fatal."There were instances where marathoners were told to fill themselves with water and then die because they slavishly adhered to the recommendations and drank far beyond the needs," Farrell explained.
rule does not apply to all people
Although Farrell drew the conclusion: "It is right to do what the body requires from us - simply drink according to thirst and do not set up an elaborate schedule for it."But this "rule" also has its faults and is not the same for all. There are also people who do not develop a sense of thirst, such as the elderly, children or some chronically ill. On the other hand, kidney problems or diabetes are often associated with an increased thirst.
Furthermore, a slightly excessive fluid intake may prevent health problems. For instance, people who are prone to gout should drink at least two liters of water a day to reduce the risk of painful gout attacks.
Since only a few subjects were involved in the current study, major investigations would have to prove the new findings. For this, among other things, blood tests are necessary.(ad)