RE: Too Much Water Poses Risks???
sunshine Wrote:this is one article which I'm really not to sure what to
make of but found interesting enough to post, what are your
idea's on the following? I think transplant recipients should
follow the amount they've been told to drink, as it's very
important to the transplanted kidney, so if anyone has any
questions or concerns your doctor is your best source for information
I just saw an article on Water myself here:
Quote:Don't drink the water - at least, not too much
Sharon Kirkey , Canwest News Service
Canadian doctors are warning that drinking too much water may cause loss of kidney function - something they discovered purely accidentally.
Researchers who have been studying the health of residents of Walkerton, Ont., since the water supply was contaminated with E. coli in 2000, identified 100 otherwise healthy adults who had a condition called proteinuria, or abnormal amounts of protein in their urine.
None had any medical conditions or were on medications that would explain why.
Proteinuria can cause kidney failure and is a sign of microvascular disease, where the heart's tiny arteries are damaged, causing cardiac disease and cardiac death.
Of the 100 people, 56 agreed to follow-up testing and to reduce their fluid intake to fewer than eight large glasses per day for one week.
The result? The cases of proteinuria were "largely reversed."
"When we were in Walkerton we were surprised that almost five per cent of the population were drinking very large volumes of fluid," said Dr. William Clark, a scientist at Lawson Health Research Institute in London, Ont., and professor of medicine at the University of Western Ontario.
"We went on the supposition that this must be because of the water contamination," meaning that when people moved to bottled water, they drank more. But Clark, project leader of the Walkerton Health Study, said most admitted to drinking vast amounts of water before the contamination crisis, for health reasons.
They were drinking, on average, at least four litres of fluid per day. "That would be about 18 large glasses of fluid per day," Clark said. Some people were drinking six litres. One woman, a health care worker, was drinking eight.
"They didn't like it when we asked them to reduce their fluid intake, although they did do it," Clark said.
"Most corrected their kidney abnormality. Some did not correct completely, meaning they may have a permanent bit of damage."
The study is published in this week's issue of the Canadian Medical Association Journal.
"If you go on the Internet you'll get at least 500 hits on how healthy it is to drink as much water as humanly possible," Clark says. "Some health magazines recommend people drink a minimum of 12 to 15 glasses of fluid per day."
HIs team has been screening the population of Walkerton to track for health syndromes associated with E. coli damage. The big, silent problem is kidney damage.
The researchers measured urine protein levels from 2,253 adults who later attended a follow-up clinic annually between 2003 and 2005.
One day Clark saw 20 patients for kidney abnormalities who had increased protein excretion in the urine, "which we know is not only a marker of damage but causes damage." The condition causes progressive loss of kidney function and accelerates aging of the kidney.
After excluding diabetes or any other explanation that could cause the problem, "we still ended up with 100 people who had no explanation whatsoever," Clark says. On average, they were excreting almost three times the normal rate.
Treatment was simple, Clark says. "When they drank less water, the problem went away."
What's not known is "whether the proteinuria associated with excessive fluid intake in these otherwise healthy people will affect their kidney function in the long term," the researchers write in this week's journal article.
Until the final data is in, "it may be advisable to discourage otherwise healthy people from consuming large volumes of water."
"This was something we've never conceived of. It's not reported anywhere," Clark said in an interview.
"We're surprised at the high number of the general population who drink excessive quantities of fluid for no known health benefit." And he doesn't think the data is unique to Walkerton. "We're drinking lots of water, and people think it's healthy."
"We would recommend until we know better that maybe eight glasses of fluid a day is fine but probably less than six is better, unless you're in a very arid climate or carrying out marathon running or massive exertion or have a particular kind of kidney damage and you lose salt."
Fluid means "all fluids," including coffee, tea and juice.
Clark says flushing the kidneys doesn't help kidney function. What's more, a study in 2003 found that drinking lots of fluid speeds up kidney damage in people with impaired kidney function.
"We also know from New York marathon that those who died and who had cardiac arrhythmias and got into difficulty were the younger, inexperienced marathon runners who drank too much fluid."
Even doctors believe the medical myth that people should drink at least eight glasses of water a day, according to an article published last month in the British Medical Journal, in which researchers traced the notion back to a 1945 recommendation from the U.S. Nutrition Council that said people should drink the equivalent of about eight glasses of fluid per day.
Ignored in the original statement was that most of the fluid people need is found in food, especially fruits and vegetables, the researchers said.
Clark recommends people drink when they're thirsty.
© CanWest News Service 2008