Over the course of at least three flu seasons, Canada’s public health agency plans to analyze the impact vitamin D levels have on flu severity and, if they find a correlation between severe flu cases and vitamin D levels, will then decide whether vitamin D can be used to lessen serious cases of seasonal flu. While the study started out focused on seasonal flu, the agency is now adapting the study to the swine flu virus.
This is exactly the type of research that stands to make a real difference in public health, with the unfortunate aspect being that it may take years to bear out.
I highly suggest you don’t wait for their results to come in, as there is already overflowing evidence showing that your low vitamin D levels play a role in your likelihood of getting the flu.
Dr. John Cannell, founder of the Vitamin D Council, first introduced the hypothesis that influenza is merely a symptom of vitamin D deficiency in the paper Epidemic Influenza and Vitamin D, published in the journal Epidemiology and Infection two years ago, followed up with another study published in the Virology Journal last year.
The findings were confirmed by a new study — the largest and most nationally representative of its kind to date — that involved about 19,000 Americans. It found that people with the lowest blood vitamin D levels reported having significantly more recent colds or cases of the flu.
In conclusion, lead author Dr. Adit Ginde stated:
“The findings of our study support an important role for vitamin D in prevention of common respiratory infections, such as colds and the flu. Individuals with common lung diseases, such as asthma or emphysema, may be particularly susceptible to respiratory infections from vitamin D deficiency.”
There is so much compelling evidence, that I believe optimizing your vitamin D levels is one of the absolute best strategies for avoiding infections of ALL kinds, and vitamin D deficiency is likely the TRUE culprit behind the seasonality of the flu — not the flu virus itself.
How do You Know if Your Vitamin D Levels are Optimal or Deficient?
In the United States, the late winter average vitamin D level is only about 15-18 ng/ml, which is considered a very serious deficiency state. It’s estimated that over 95 percent of U.S. senior citizens may be deficient, along with 85 percent of the American public.
Unless you are getting daily sun exposure on a large portion of your body, it’s imperative that you are taking a vitamin D supplement.
For adults, the appropriate dose is likely 4,000-5,000 units per day, but it could be even higher. In fact, according to Dr. Heaney, your body requires 4,000 IU’s daily just to maintain its current vitamin D level. So in order to actually raise your levels, you’d have to increase either your exposure to sunshine, or supplement with oral vitamin D3.
If you go in for your vitamin D blood test, if you’re in the United States be certain your test is performed at a lab like Labcorp, which uses the gold standard Diasorin test for checking vitamin D levels.
Also be sure you order the correct test. 25(OH)D, also called 25-hydroxyvitamin D, is the better marker of overall D status. It is this marker that is most strongly associated with overall health.
You Can Use Vitamin D to Treat the Flu, Too
As I said earlier, if you were to maintain your vitamin D levels within the optimal range shown above, you would likely avoid being affected during the cold and flu season entirely.
That said, if you are coming down with flu-like symptoms and have not been on vitamin D you can take doses of 50,000 units a day for three days to treat the acute infection. Some researchers like Dr. Cannell believe the dose could even be as high as 1,000 units per pound of body weight for three days.
However, most of Dr. Cannell’s work was with seasonal and not pandemic flu. If your body has never been exposed to the antigens there is chance that the vitamin D might not work.
Ultimately, your best bet is to maintain healthy levels of vitamin D around 60 ng/ml year-round.
Scorce: Dr. Mercola http://articles.mercola.com/sites/articles/archive/2009/08/27/Canada-Looks-at-Vitamin-D-for-Swine-Flu-Protection.aspx
2 comments
Tom Kirk says:
26/10/2010 at 5:27 am (UTC 10 )
Because some of you might not know, vitamin D is a great supplement to take as proper supplementation prevents you from getting sick as often, especially if you are prone to a lot of allergies. If you have sufficient amounts of vitamin D in your diet, you are less prone to certain illnesses than you would normally be.
[Reply]
Bryan McHeyzer says:
26/10/2010 at 10:54 am (UTC 10 )
@Tom Kirk,
Hi Tom,
Thanks for the visit and your comments.
Until recently I did not realise the importance of vitamin D.
Cheers
Bryan
[Reply]