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This is to address the issue of anemia in celiac disease.
Anemia is common in untreated CD and is often due to IRON def, folate
acid def as the two most common nutritional deficiencies.
Anemia that persists after the GFD is started may of course be due to the
preceeding def. state or an associated condition.  the most common one is
pernicious anemia.  This is another autoimmune disease that affects the
abilty to absorb vit B12.  Oral b12 does not make up for this.  It is
easily diagnosed with a blood test.  Other conditions can also cause
anemia such as LUPUS, ulcers( these can be peptic or more seriously
occur  as a complication of celiac disease in the intestine.
another cause is intestinal blood loss from the GI tract due a malignant
or sometimes benign growth.  The continuation of anemia in a celiac or
the new occurence in a trEATED celiac should prompt careful consideration
of the diagnostic considerations NOT empiric trials of self prescribed
regimes.  this is especially important in patients over 40 years of age
There are many other rare causes of anemia so its not always simple
sometimes requires the attention of a hematologist in addition to a
gastroenterologist.
Joe murray