--the fact of borderline ferretin and/or B12 increases the suspicion of gluten sensitivity/celiac, given that nutritional malabsorption is certainly a result of the immune attack on the villi of the small intestine.

She really could use a comprehensive gluten/celiac panel (anti-gliadin IgA and IgG, anti-transglutaminase IgA and IgG, anti-endomyesial antibodies), though these can sometimes be negative even in biopsy proven celiacs.