Posts Tagged ‘vitamin D3’

Vitamin D3 / The Epidemiology of Influenza

I recently read an interesting article published in a medical journal, Virology Journal, February 25, 2008, Volume 5. The authors are John J. Cannell, Michael Zasloff, Cedric F. Garland, Robert Scragg and Edward Giovannucci.  The title of the article is “On the Epidemiology of Influenza”.

I thought this was pertinent because of the concern over the H1N1 virus as well as this being onset of the time of year for season influenza.  I will list some of the highlights of this article:

  • A 2006 study concluded that there has been no evidence of a reduction in influenza related mortality in the last 15 years despite the increase of influenza vaccination coverage from 10% to 60%.
  • In a  2007 study, 104 women given vitamin D were 3 times less likely to report cold and flu symptoms than placebo.  800 IU/day of vitamin not only reduced reported incidence, it abolished the seasonality of reported colds and flu.  A higher dose (2000 IU/day) virtually eradicated all reports of colds or flu.
  • Compelling epidemiologal evidence indicates vitamin D deficiency is the ‘seasonal stimulus’, responsible for flu outbreaks.
  • Lower respiratory tract infections are more frequent in those with low vitamin D3 levels.

Of course this is just 1 article, but certainly it makes us look at our vitamin D3 levels.  As always I suggest people speak with their primary physicians, chiropractors and/or do their own research before taking levels of supplements/vitamins higher than the RDA.  That being said the “National Academy of Sciences – Institute of Medicine” recommends the adequate intake of vitamin D3 should be revised upward to at least 2,000 to 4,000 IU/day.

I will keep my eyes open for other published articles that may be of interest.  I know I just started this blog, but I will be discussing many different topics over the upcoming weeks.  If there are specific questions and/or comments, don’t hesitate to contact me at or through my website: chiropractor west palm beach