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Hi, we have iron deficiency anemia in a young woman that is refractory (it isn't helped) to taking iron supplements and balanced nutrition. Have your doctors considered autoimmune atrophic gastritis?
Iron deficiency anemia can cause most or all of your symptoms, and autoimmune atrophic gastritis can cause you to not absorb iron. Also, I'm guessing that you have some reason to suspect an autoimmune condition, since you asked on this forum.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5065578/
https://ashpublications.org/blood/article/123/3/326/32289/How-I-treat-unexplained-refractory-iron-deficiency