--that B12 level certainly adds weight to the argument that you have gastric malabsorption, even if you would not currently rise to the level of "biopsy proven flattened villi gold standard celiac".

Vitamin and mineral malabsorption/deficiency are very common in gluten sensitivity/celiac (I wonder what your Vitamin D and calcium/magnesium/potassium levels are), though, of course, there are many possible causes of such malabsorption/deficiency. They may all be ultimately related to too much intestinal permeability (Google: "zonulin" if you want to read about the cutting edge of research/theory here).

I don't think any of us would think a B12 levle of 344 is "normal"--especially if you received that result after starting to take supplements (what kind are you taking, by the way?). Most of us believe the serum B12 can be a misleading/incomplete test--people have symptoms of deficiency even into the 500's/600's at times--but the ranges you quoteed are WAY outdated. In Japan and many parts of Europe, the low end of the range starts at 500-550, and there is no uppler limit. Most of us strive for four-figure serum concentration numbers to make sure our tissues are at least well-bathed in B12.

You should definitely take a look at Rose's B12 site:

http://roseannster.googlepages.com/home


--and anything Mrs. D has written about vitamin/mineral deficiency; in fact, our vitamin/supplement forum is a good place to go:

http://neurotalk.psychcentral.com/forumdisplay.php?f=49