Vitamin D

[facetguy]

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Will this get much play in the pediatrics world?

2 new Vitamin D studies:
http://pediatrics.aappublications.org/cgi/content/abstract/peds.2009-0213v1
Conclusions: Low serum vitamin D in US adolescents is strongly associated with hypertension, hyperglycemia, and metabolic syndrome, independent of adiposity.

and

http://pediatrics.aappublications.org/cgi/content/abstract/peds.2009-0051v1
This 2nd link is to a study that shows that 70% of all US kids are too low on vitamin D.



Also, 3 minute interview w/ author of one of the new studies, who in a separate inteview said this was "astounding" and that they "couldn't believe the numbers", despite considerable previous research suggesting the same thing:
http://www.eurekalert.org/multimedia/pub/15663.php?from=141752

 

[TexasRose]

Will this get much play in the pediatrics world?

2 new Vitamin D studies:
http://pediatrics.aappublications.org/cgi/content/abstract/peds.2009-0213v1
Conclusions: Low serum vitamin D in US adolescents is strongly associated with hypertension, hyperglycemia, and metabolic syndrome, independent of adiposity.

and

http://pediatrics.aappublications.org/cgi/content/abstract/peds.2009-0051v1
This 2nd link is to a study that shows that 70% of all US kids are too low on vitamin D.



Also, 3 minute interview w/ author of one of the new studies, who in a separate inteview said this was "astounding" and that they "couldn't believe the numbers", despite considerable previous research suggesting the same thing:
http://www.eurekalert.org/multimedia/pub/15663.php?from=141752

Very interesting articles. You have a special interest in Vit D research?

 

[bjackrian]

I do wonder if it has something to do with "inside time." I.E., kids who spends lots of time in front of screens likely inactive and would also have low vitamin D (from less sunlight exposure) even if they are not fat, so this strikes me as a true, true, but unrelated kind of study.

 

[facetguy]

Very interesting articles. You have a special interest in Vit D research?

A number of years ago, I heard a lecture on vitamin D given by Michael Holick, MD,PhD (a big vitamin D expert) and was astonished that, despite my interest in nutrition, I was largely unaware of most of the vitamin D literature. So since then I've been keeping an eye on these studies and have watched as tons of D research has been published in many fields. It's a very hot area of research.

 

[facetguy]

I do wonder if it has something to do with "inside time." I.E., kids who spends lots of time in front of screens likely inactive and would also have low vitamin D (from less sunlight exposure) even if they are not fat, so this strikes me as a true, true, but unrelated kind of study.

I think this is a big part of it. Studies have been done in such sunny areas as Arizona, Southern California, Florida, Middle East, etc, and people still turn up D deficient.

Infants, especially breastfed infants, are apparently at high risk, not so much because of their own lack of sun exposure but because their moms don't get enough D themselves and therefore don't transfer much D in their breastmilk. From the limited available data (and going from memory here), it appears that lactating women need to take at least 4000 IU of D per day, and maybe even over 6000 IU, to transfer vitamin D. The majority of these women aren't getting anywhere near this.

 

[ILikeDrugs]

I ran into a very interesting article many years ago while doing some research on vitamins and supplements. It appears that the amount of vitamin d that is necessary for the human body to be not deficient is well above the recommended daily dose of 400 IU.

On average, the amount of vitamin D supplementation
required to reach a therapeutic vitamin D
blood level is higher than previously thought. If 32 ng/
mL 25(OH)D blood level is accepted in the United
States as the necessary minimum for preventing bone
loss, a minimum daily intake of 2,600 IU of vitamin D3

http://www.thorne.com/media/VitDFractReduction13-1.pdf

and here is another vitamin d review article.

http://www.thorne.com/media/VitaminDMono13-2.pdf

 

[facetguy]

I think we'll see the RDA for D go up quite a bit. As those in this forum know, the AAP recently doubled the RDA for kids from 200 to 400 IU/day. We will also likely see the current upper limit of 2000 IU/day increase, as some vitamin D experts are suggesting as high as 10,000 IU/day is more realistic for an UL. 400 IU/day has little positive impact for many adults, especially considering how many people are starting out in an insufficient or deficient state to begin with.