Drink 8 glasses a day recommendation Misleading?

Drink at least eight glasses of water a day is the advice that has long-gaungkan digaung. This custom is believed to help prevent kidney damage, weight loss and improve concentration.

But some health experts in Britain have recently warned that drinking eight glasses of water a day is the proverbial wrong and may even be harmful. They even dare to claim, the scientific claims behind this suggestion was "nonsense".
In England, the National Health Service (NHS) together with leading physicians and nutritionists have long advised people to drink about 1.2 liters of water per day to maintain health.
However, a recent report written in the British Medical Journal explains that the threat of dehydration is a 'myth' and said that so far there is no evidence behind the claim that drinking lots of water can prevent some health problems.
A doctor in Glasgow, Margaret McCartney, the journal said that the recommendation within the NHS website in order to drink six to eight glasses a day is not just a nonsense, but also embarrassing.
He added that the benefits of drinking lots of water is often exaggerated and carrying interest, for example, from bottled water companies.
In the BMJ, Dr. McCartney also stressed that the research shows that drinking water when not thirsty can actually disrupt rather than improve concentration. Other evidence also suggests that the germ-killing chemicals found in bottled water can be bad for your health.
Drinking excessive amounts can also cause lack of sleep because someone had to get up at night to go to the toilet. Other studies suggest, may even cause kidney damage, not prevent it.
Dr. McCartney also warned that drinking too much water can cause a rare but potentially fatal called hyponatremia. This condition makes salt levels in the body decreases and can lead to brain swelling.
In 2003, actor Anthony Andrews fell ill from drinking too much water during practice roles.
Another doctor quoted in the article adds, there are no reasonable grounds to claim that the water can help you lose weight by suppressing appetite.
Professor Stanley Goldfarb, an expert on metabolism from the University of Pennsylvania in the U.S., said: "The current evidence suggests that there is no evidence. If children drink more water than getting the extra calories from soda, that's good. But there is no evidence that drink water before meals to reduce appetite at dinner. "
Around 2:06 billion liters of bottled water sold in Britain last year. This figure is an increase over 2000, which was only 1:42 billion liters.