@trents @knitty kitty would NCGS show some celiac in biopsy?     

@trents blood tests were IgA 47-310 normal range - mine was 120; TTG <15.0 antibody not detected, mine was <1.0.

I would make sure he gets checked for B12 and D deficiencies at the minmium. Ferritin is a storage protein for iron. If it is low, it could mean his iron needs are currently being met by robbing from storage but the storage is not being replenished. I find it interesting that his fatigue set in during the winter months. If you live in a northern latitude or where there is a lot of cloudy weather during t he winter months, your husband could be experiencing low vitamin D levels. Even aside from geography and climate considerations, people who spend most of their time indoors are often vitamin D deficient. Low vitamin D levels is a chronic problem in developed countries where people's livelihoods keep them indoors during the day.

Yes he has had recent blood work.  Other than low ferritin everything else was normal 

@LizzieF, if you will be seeking repeat blood antibody testing after undergoing a more rigorous gluten challenge, make sure your physician orders the "total IGA" test to check for IGA deficiency. If you are IGA deficient, all other IGA test scores will be artificially low and this can result in false negatives. Can you list the blood antibody tests that were already done, the scores along with the reference ranges?