Hello there ... I am on prednisone and florinef (for years now) because I have Addison's, plus RA, fibromyalgia, and a few other autoimmune diseases ... this iron loss is a mystery, but the exhaustion has been for so long it is ridiculous ... then the other prompts of aging and diseases fill that question for most (doctors) but there is something else going on .. I am so tired of trying to find answers. I get depressed and just want to give up really.