Re: water (and what I sent )
[email protected]
I'm glad to see this because I've asked similar things and people have kinda
snorted and said "that's dumb."
There are other mammals who don't drink water, and in the middle ages people
didn't drink water. Of course now they're dead...
No need to guzzle all that water, expert says
By Maggie Fox
WASHINGTON, Aug 9 (Reuters) - Trying to do the "right" thing by drinking
eight full glasses of water a day may do little more than make a person run
to the bathroom, a researcher said on Friday.
Newspaper articles, health and beauty magazines all advise drinking at least
8 full glasses of water a day totalling 64 ounces (two litres) for optimal
health -- an approach called "8x8" by proponents.
But Dr. Heinz Valtin of Dartmouth Medical School in New Hampshire said there
is no scientific evidence to back up this advice, which has helped create a
huge market for bottled water.
"After 10 months of careful searching I have found no scientific evidence
that supports '8x8'," Valtin, who has written textbooks on the subject of
human water balance, said in a telephone interview.
Writing in the American Journal of Physiology, Valtin, a kidney specialist,
said people forget that the food they eat also contains some water.
The Food and Nutrition Board of the National Research Council has recommended
that people take in about one milliliter of water for each calorie of food
eaten.
This adds up to two liters, or 74 fluid ounces on an average 2,000-calorie
diet. But the National Research Council also noted that much of this is
already contained in food.
"I did 43 years of research on that system -- the osmoregulatory system. That
system is so precise and so fast ting the loss of water through the skin,
Valtin said. Thirst kicks in long before dehydration starts, he added.
"It does it very quickly and very accurately and it does so in minutes,"
Valtin said.
He said he and colleagues became concerned after seeing dozens of newspaper
and magazine articles urging people to sip water all day. "I started talking
to my colleagues and asking them 'Do you know of any evidence for this?'.
Invariably, they said, 'No I think it's a myth'," Valtin said.
The journal asked him to review all the scientific studies he could find and
he concluded that someone misinformed has been telling people to drink large
amounts of water when most do not need to.
"I am referring to healthy adults in a temperate climate leading a largely
sedentary existence," Valtin said. "Persons with certain diseases must have
large volumes of water -- kidney stones are probably the most common example."
The rest can just drink enough to slake thirst -- and this includes coffee,
tea, and even beer -- despite their diuretic effects, Valtin said.
He hopes people will be relieved of the guilt of not getting enough water,
and of the expense of buying bottled water to drink throughout the day.
"There is also the possibility that if you drink a lot of water that happens
to be polluted then of course you get more pollutants," Valtin said.
"Then there is the inconvenience of constant urination, the embarrassment of
having to go to the bathroom all the time," he added.
And overdoses of water can cause water intoxication that can lead to
confusion and even death. Water intoxication is one deadly effect of taking
the drug Ecstasy, for instance, because it makes people thirsty beyond their
physical needs.
snorted and said "that's dumb."
There are other mammals who don't drink water, and in the middle ages people
didn't drink water. Of course now they're dead...
No need to guzzle all that water, expert says
By Maggie Fox
WASHINGTON, Aug 9 (Reuters) - Trying to do the "right" thing by drinking
eight full glasses of water a day may do little more than make a person run
to the bathroom, a researcher said on Friday.
Newspaper articles, health and beauty magazines all advise drinking at least
8 full glasses of water a day totalling 64 ounces (two litres) for optimal
health -- an approach called "8x8" by proponents.
But Dr. Heinz Valtin of Dartmouth Medical School in New Hampshire said there
is no scientific evidence to back up this advice, which has helped create a
huge market for bottled water.
"After 10 months of careful searching I have found no scientific evidence
that supports '8x8'," Valtin, who has written textbooks on the subject of
human water balance, said in a telephone interview.
Writing in the American Journal of Physiology, Valtin, a kidney specialist,
said people forget that the food they eat also contains some water.
The Food and Nutrition Board of the National Research Council has recommended
that people take in about one milliliter of water for each calorie of food
eaten.
This adds up to two liters, or 74 fluid ounces on an average 2,000-calorie
diet. But the National Research Council also noted that much of this is
already contained in food.
"I did 43 years of research on that system -- the osmoregulatory system. That
system is so precise and so fast ting the loss of water through the skin,
Valtin said. Thirst kicks in long before dehydration starts, he added.
"It does it very quickly and very accurately and it does so in minutes,"
Valtin said.
He said he and colleagues became concerned after seeing dozens of newspaper
and magazine articles urging people to sip water all day. "I started talking
to my colleagues and asking them 'Do you know of any evidence for this?'.
Invariably, they said, 'No I think it's a myth'," Valtin said.
The journal asked him to review all the scientific studies he could find and
he concluded that someone misinformed has been telling people to drink large
amounts of water when most do not need to.
"I am referring to healthy adults in a temperate climate leading a largely
sedentary existence," Valtin said. "Persons with certain diseases must have
large volumes of water -- kidney stones are probably the most common example."
The rest can just drink enough to slake thirst -- and this includes coffee,
tea, and even beer -- despite their diuretic effects, Valtin said.
He hopes people will be relieved of the guilt of not getting enough water,
and of the expense of buying bottled water to drink throughout the day.
"There is also the possibility that if you drink a lot of water that happens
to be polluted then of course you get more pollutants," Valtin said.
"Then there is the inconvenience of constant urination, the embarrassment of
having to go to the bathroom all the time," he added.
And overdoses of water can cause water intoxication that can lead to
confusion and even death. Water intoxication is one deadly effect of taking
the drug Ecstasy, for instance, because it makes people thirsty beyond their
physical needs.
Sharon Rudd
> And overdoses of water can cause water intoxicationIs this sort of a slow drowing? Or is it different? Is
> that can lead to
> confusion and even death.
that a chronic over-doing of the water or a binge
kinda thing? Just wondering how this works. Or does
it flush out all of the electrolytes and THAT is the
problem (I have cautioned some dieters about that,
occasionally).
No over-water consumption problems here :-)
Sharon of the Swamp
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Karen
Death can occur from hyponatremia (low salt) due to medullary washout in the
kidneys, or pulmonary edema, and even cerebral edema. Psychogenic polydipsia
is another condition where people drink way more than they need to and can
have problems.
You occasionally see water intoxication in animals as well, with open access
to water after being deprived, or with certain hormonal conditions.
Karen
-----Original Message-----
From: Sharon Rudd [mailto:bearspawprint@...]
Sent: Monday, August 12, 2002 7:18 PM
To: [email protected]
Subject: Re: [AlwaysLearning] Re: water
that a chronic over-doing of the water or a binge
kinda thing? Just wondering how this works. Or does
it flush out all of the electrolytes and THAT is the
problem (I have cautioned some dieters about that,
occasionally).
No over-water consumption problems here :-)
Sharon of the Swamp
__________________________________________________
Do You Yahoo!?
HotJobs - Search Thousands of New Jobs
http://www.hotjobs.com
To unsubscribe from this group, send an email to:
[email protected]
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kidneys, or pulmonary edema, and even cerebral edema. Psychogenic polydipsia
is another condition where people drink way more than they need to and can
have problems.
You occasionally see water intoxication in animals as well, with open access
to water after being deprived, or with certain hormonal conditions.
Karen
-----Original Message-----
From: Sharon Rudd [mailto:bearspawprint@...]
Sent: Monday, August 12, 2002 7:18 PM
To: [email protected]
Subject: Re: [AlwaysLearning] Re: water
> And overdoses of water can cause water intoxicationIs this sort of a slow drowing? Or is it different? Is
> that can lead to
> confusion and even death.
that a chronic over-doing of the water or a binge
kinda thing? Just wondering how this works. Or does
it flush out all of the electrolytes and THAT is the
problem (I have cautioned some dieters about that,
occasionally).
No over-water consumption problems here :-)
Sharon of the Swamp
__________________________________________________
Do You Yahoo!?
HotJobs - Search Thousands of New Jobs
http://www.hotjobs.com
To unsubscribe from this group, send an email to:
[email protected]
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/