Fw: [CR] Recommendations for Vitamin D should be revised upward

[Guest guest]

Here is says we use 4000 IU and get 90% from sunlight.

Assuming what we get from sunlight is minimal, is 4000 IU by

mouth adequate? Or is there a 50% loss in absorption?

TOL, we must absorb more from minor exposure than we think

maybe.

Can we judge the dose by the tanning of the skin?

Regards.

[CR] " Recommendations for Vitamin D should be

revised upward "

> Just a news blurb from an upcoming JAMA article. I guess

there is nothing new here, but I see that there is growing

consensus that the levels of calcium are " secondary " to bone

health.

>

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>

>

http://www.forbes.com/lifestyle/health/feeds/hscout/2005/11/

08/hscout529005.html

>

> =-=-=-==-=-=-=-==--

>

> " The findings add " to the current opinion that

recommendations for vitamin D intake should be adjusted

upward, " said , a nutritional epidemiologist at

the Tufts University Mayer Human Nutrition Research

Center on Aging.

> Current recommendations call for 300 to 600 International

Units of vitamin D a day, with the amount increasing with

age. " Quite a few people advocate as much as 1,000

International Units a day, with 1,000 to 1,200 milligrams of

calcium, " said.

>

> One of those advocating much higher levels of vitamin D

intake is Dr. P. Heaney, an endocrinologist who holds

the title of university professor at Creighton University,

in Omaha, Neb.

>

> " I am concerned about the elderly and infirm, " Heaney

said. " They don't make as much vitamin D as other people and

they have a higher requirement for it. We need to consider

giving everyone enough so that the vulnerable get as much as

they need. I think we could do that without endangering

people who get above-the-normal blood level range, but that

is not a universal consensus. "

>

> Vitamin D is an unusual nutrient, Heaney noted, because

people get very little of it from food. " My best estimate is

that the body uses 4,000 International Units a day, " he

said. " We get about a tenth of that by mouth. The other 90

percent comes from the skin, created by exposure to

sunlight. "

>

> And exposure to sunlight can vary widely, affected by not

only the weather but also social influences, Heaney said.

For example, vitamin D deficiency is common in Saudi Arabia,

he said, because men and women cover most of their bodies

with flowing robes.

>

> And there is still a lot to be learned about vitamin D,

Heaney said. " Vitamin D is probably more important than most

of us realized until recently, " he said. " But we have

studied it in the context of vitamin deficiency. We have to

do a better job of nailing down the optimum daily

requirements. "

>

>

>

> =-=-==-=-==-=-=-

>

> T. pct35768@...

>

[Guest guest]

Here is says we use 4000 IU and get 90% from sunlight.

Assuming what we get from sunlight is minimal, is 4000 IU by

mouth adequate? Or is there a 50% loss in absorption?

TOL, we must absorb more from minor exposure than we think

maybe.

Can we judge the dose by the tanning of the skin?

Regards.

[CR] " Recommendations for Vitamin D should be

revised upward "

> Just a news blurb from an upcoming JAMA article. I guess

there is nothing new here, but I see that there is growing

consensus that the levels of calcium are " secondary " to bone

health.

>

> =-=-=-=-=-=-=-=-=-=-=

>

>

http://www.forbes.com/lifestyle/health/feeds/hscout/2005/11/

08/hscout529005.html

>

> =-=-=-==-=-=-=-==--

>

> " The findings add " to the current opinion that

recommendations for vitamin D intake should be adjusted

upward, " said , a nutritional epidemiologist at

the Tufts University Mayer Human Nutrition Research

Center on Aging.

> Current recommendations call for 300 to 600 International

Units of vitamin D a day, with the amount increasing with

age. " Quite a few people advocate as much as 1,000

International Units a day, with 1,000 to 1,200 milligrams of

calcium, " said.

>

> One of those advocating much higher levels of vitamin D

intake is Dr. P. Heaney, an endocrinologist who holds

the title of university professor at Creighton University,

in Omaha, Neb.

>

> " I am concerned about the elderly and infirm, " Heaney

said. " They don't make as much vitamin D as other people and

they have a higher requirement for it. We need to consider

giving everyone enough so that the vulnerable get as much as

they need. I think we could do that without endangering

people who get above-the-normal blood level range, but that

is not a universal consensus. "

>

> Vitamin D is an unusual nutrient, Heaney noted, because

people get very little of it from food. " My best estimate is

that the body uses 4,000 International Units a day, " he

said. " We get about a tenth of that by mouth. The other 90

percent comes from the skin, created by exposure to

sunlight. "

>

> And exposure to sunlight can vary widely, affected by not

only the weather but also social influences, Heaney said.

For example, vitamin D deficiency is common in Saudi Arabia,

he said, because men and women cover most of their bodies

with flowing robes.

>

> And there is still a lot to be learned about vitamin D,

Heaney said. " Vitamin D is probably more important than most

of us realized until recently, " he said. " But we have

studied it in the context of vitamin deficiency. We have to

do a better job of nailing down the optimum daily

requirements. "

>

>

>

> =-=-==-=-==-=-=-

>

> T. pct35768@...

>