Vitamin D

Apr 27, 2009

Over the past two years I have worried about my B12 intake due to my lack of intrinsic factor.  As you know, after GBS surgery patients can no longer absorb B12 from normal dietary intake due to the changing of the anatomy.  Sublingual B12 or B12 shots are the only way to get the dietary requirements for B12.  This is for life, so therefore I worried about my intake and making sure I took it as required. 

I just got a call from my general physician after my 2 year lab draw and everything was fine, except for my vitamin D level.  The normal range for D is 32-100 ng/mL, my level was 16.6 ng/mL.  She put me on 5000 IU of Vitamin D once a week until we can get it back up to normal levels.  This is never something I thought about having trouble with and I did some research and I found this from the Mayo clinic's website in regards to vitamin D deficiency:

"Also, individuals who have fat malabsorption syndromes (e.g., cystic fibrosis) or inflammatory bowel disease (e.g., Crohn's disease) are at risk."

And while it doesn't specifically mention GBS it does mention fat malabsorption and that is one of the effects of GBS.  I just thought I would pass along this nugget of information.

*Edited to add my lab results (minus identifying/personal info):      


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Tallahassee, FL
Jan 29, 2007
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