Curious About What Vitamins Are You Deficient? in Post Diagnosis, Recovery & Treatment of Celiac Disease Posted June 21, 2012 · Report to Admin My B12 was around 120 when I was diagnosed with celiac and has since gone up to very normal levels (>500). I have to take daily D3 drops because my vit D does not go up even with sun exposure. It was <20 and it is >40 now. I have never had iron deficiency, though I know it's common with celiac.