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I think this is typical and that many or even most guys on TRT are walking around with ferritin levels like this if they were to check.  I've heard some argue it is not a real iron deficiency because there is still plenty of iron in the body -- it is basically being stored in hemoglobin instead of ferritin, and the body does recycle iron from aged red blood cells.  This camp argues low ferritin is just a normal condition of being on TRT and is not cause for concern. Then there are some like Systemlord where TRT does seem to create a symptomatic deficiency.  That seems less common though.

What does for sure create a real iron deficiency is frequent blood donations.