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PostPosted: Mon Aug 16, 2010 7:19 pm 
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Quote:
Those who had blood levels lower than 38 ng/ml (nanograms per milliliter) had twice as many upper respiratory tract infections.

Among the 18 people in the study who consistently maintained blood levels of vitamin D above 38 ng/ml, 15 were completely free of upper respiratory tract infections -- no colds, no flu! (Of those 18 folks, 13 were taking vitamin D supplements. More about that in a minute.)



http://www.huffingtonpost.com/bill-gott ... 51576.html

The Easiest Way to Prevent Colds and Flu

Is there any way to make yourself less vulnerable to these two infections?

Quote:
Yes, says a study published on June 14 in the open access online medical journal Plos One. Make absolutely certain you have higher-than-normal blood levels of vitamin D.

Here's what you need to know about the study and its practical application.

The study was led by James R. Sabetta, MD, in the Department of Medicine at Yale University School of Medicine and the Section of Infectious Diseases at Greenwich Hospital in Greenwich, Connecticut. He and his colleagues observed the obvious: rates of "acute respiratory tract infections" (colds and flu) rise in the fall and winter. But why? Could the seasonal drop in blood levels of vitamin D -- a hormone-like nutrient produced most abundantly in the body when the skin is exposed to the strong, direct sunlight of summer -- explain the phenomena?

To find out, the researchers took monthly measurements of the blood levels of vitamin D (25-hydroxyvitamin D) in 195 healthy adults. The measurements started the third week in September and continued for the next four to five months. At the same time, the study participants were asked to report any acute respiratory tract infections. The results were, well, decisive.

Those who had blood levels lower than 38 ng/ml (nanograms per milliliter) had twice as many upper respiratory tract infections.

Among the 18 people in the study who consistently maintained blood levels of vitamin D above 38 ng/ml, 15 were completely free of upper respiratory tract infections -- no colds, no flu! (Of those 18 folks, 13 were taking vitamin D supplements. More about that in a minute.)

And when the above-38 group did succumb to cold or flu, their illnesses were shorter. The percentage of days ill with acute respiratory tract infections in the above-38 group was 4.9 times lower than in the below-38 group.

Of the other 180 participants -- all of them with blood vitamin D levels consistently below 38 ng/ml -- 81 developed colds and flu.

The study's statistical summary: the 38 plus group had a two-fold decrease in the risk of developing a cold or flu.

The Yale researchers aren't the first to link vitamin D levels and the flu. In research reported in the American Journal of Clinical Nutrition in March, 2010, Japanese doctors studied 334 children, half of whom took 1200 IU of vitamin D daily. Eighteen of the children taking vitamin D developed the flu, compared to 31 children not taking the vitamin, a risk reduction of 58 percent. An earlier study in the Archives of Internal Medicine looked at 19,000 adults and adolescents and found that those with the lowest blood levels of vitamin D were 40 percent more likely to have had a recent cold or flu, compared to those with the highest levels. In another study, women taking 2,000 IU of vitamin D (to protect bones) had an average of nine episodes of colds and flu over three years of taking the supplement -- compared to an average of 30 episodes in a group of women taking 200 IU of vitamin D.

But the Yale study was the first to methodically track vitamin D levels and colds/flu incidence during the cold/flu season. What did the Yale researchers have to say about their startling results?

"Maintenance of a 25-hydroxyvitamin D serum concentration of 38 ng/ml or higher should significantly reduce the incidence of acute viral respiratory infections and the burden of illness caused thereby, at least during the fall and winter." Easier said than done.



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PostPosted: Fri Nov 05, 2010 11:37 am 
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Joined: Sun Nov 08, 2009 11:34 am
Posts: 13
Just wanted to post some test results for those who might be interested:

My kids (5 and 7) have been taking a gummy d3 (1,000 iu) and a multi vitamin with 800 iu vitamin d. Thier results were:

5 year old - 40
7 year old - 32

These tests were from the vitamin d council "do it yourself" home kits.

I have been taking 2,000 iu d3 every day. My results from my endo were: 34.

Glad I got us all tested. Now I know I have to up the dose...


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PostPosted: Wed Jan 05, 2011 1:12 pm 
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Joined: Wed Aug 19, 2009 2:33 pm
Posts: 2826
I would think that parents of school-aged children in the UK are frustrated by lack of access to flu vaccines as their children head back to school. Maybe making sure that their children get the recommended level of vitamin D would be something that could help keep their children healthier [although a vaccine would be a first choice, if available].


Iron, Vitamin D May Lead to Smarter, Healthier Children

http://www.voanews.com/learningenglish/ ... 08674.html

Another new study, published in the journal Pediatrics, looks at levels of vitamin D in babies. It says newborns with the lowest levels were twice as likely to develop respiratory infections as those with normal levels of vitamin D.

Vitamin D helps build strong bones and strengthens the body's defenses against disease. The vitamin is commonly added to cow's milk and also found in supplements. But vitamin D is called the sunshine vitamin. The body naturally produces it from sunlight.

Carlos Camargo from Harvard Medical School in Massachusetts and other researchers did the study. It followed more than nine hundred children in New Zealand until they were five years old.

CARLOS CAMARGO: "And what we found was that children who had the lowest levels of vitamin D had a high risk of developing infections and wheezing throughout childhood."


He says the problem of vitamin D deficiency is not limited to countries with the least sun.

CARLOS CAMARGO: "People are moving more and more indoors. And they work indoors. They play indoors. Everything’s indoors. And so we’re actually starting to see low levels of vitamin D in areas where the sun is plentiful."


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PostPosted: Tue May 24, 2011 8:47 pm 
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Joined: Wed Aug 19, 2009 2:33 pm
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http://www.doctorslounge.com/index.php/news/pb/20327

Severe Vitamin D Deficiency Linked to Pneumonia Deaths
Last Updated: May 23, 2011.

In hospitalized patients with community-acquired pneumonia, severe vitamin D deficiency, but not antimicrobial peptide levels, is associated with increased 30-day mortality, according to a study published in the May issue of Respirology.

The investigators found that severe 25-hydroxyvitamin D deficiency (blood level lower than 30 nmol/L), found in 15 percent of the patients, was correlated with increased 30-day mortality (odds ratio, 12.7), compared to the patients with sufficient levels of vitamin D (>50 nmol/L). The increase in mortality was not accounted for by comorbidities, differences in age, or severity of acute illness. No association was seen between cathelicidin and beta-defensin-2 blood levels and mortality, although a trend toward increased mortality was seen with lower blood levels of cathelicidin (P = 0.053). In addition, 25-hydroxyvitamin D levels could not be correlated with that of cathelicidin and beta-defensin-2.


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PostPosted: Tue May 24, 2011 9:57 pm 
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Joined: Sat Jan 30, 2010 2:44 am
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From memory, is the question not whether low Vit D can be a factor with flu but whether high Vit D has a protective effect?


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