Vitamin D stands for "defense"

Posted on October 13th, 2009 by by Solanova

field_sunset_400x386

We already know that vitamin D is crucial for calcium absorption and also may help to fortify the immune system.  Getting enough exercise, relaxing in (a little) sun once in a while and taking a quality vitamin D supplement can all be important aspects of good health.

Have you ever imagined why as soon as the season for colds begins, we tend to catch cold and influenza? This corresponds to less sunlight and thus vitamin D insufficiency.

A study was carried out originally to test the hypothesis that vitamin D supplementation would prevent bone loss in calcium-replete, African-American post-menopausal women. Half of 208 women were randomized to receive placebo or 800 IU/d of vitamin D for 1 year, followed by 2,000 IU/d for 2 years.

The incidence of symptoms of colds or influenza were determined at 6-month intervals by questioning. During 3 years, 26 subjects on placebo reported cold and influenza symptoms vs. 8 in the D group ( <0.002). The placebo group had symptoms mostly in winter, the 800 IU/d group had infrequent symptoms distributed evenly throughout the year, while only a single subject on 2,000 IU/d had symptoms, and this was in summer. For the high-dose group, some of the white bars in the figure appear to be missing, but that is because the number of sick subjects was zero. A biochemical rationale was proposed for this result

+++++++++++++++++++++++++

Click here to sign up for our AutoShip program and Save 10% on Every order!  To learn more about health related topics check out our health concerns archives.

Reference: http://www.vitasearch.com/get-clp-summary/38559Reduced prediagnostic 25-hydroxyvitamin D levels in women with breast cancer: a nested case-control study,” Rejnmark L, Mosekilde L, et al, Cancer Epidemiol Biomarkers Prev, 2009; 18(10): 2655-60. (Address: Department of Endocrinology and Metabolism C, Aarhus Sygehus, Aarhus University Hospital, Tage-Hansens Gade 2, DK-8000 Aarhus C, Denmark. E-mail: rejnmark@post6.tele.dk ).
Reference: Aloia JF, Li-Ng M. Correspondence. Epidemiol Infect 2007;12:1095-1096.


Tags:

Leave a Reply