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7.Sikiric P, et al

Sometimes these changes can be seen at endoscopy (see figures 1 and 2 below), but sometimes they are only found once small samples (biopsies) are taken from the gullet

This is why it is studied for therapeutic purposes

The absorption of vitamin B12 is fraught with hurdles: In the stomach, vitamin B12 needs to bind with a protein called Intrinsic Factor to absorb, plus sufficient acid to release it from protein foods
