I am suffering from extreme hair loss. My blood work shows low Vitamin D, and Ferritin in the mid 400's. Treating the low Vit. D with supplements. Went to a rheumatologist for autoimmune but all tests turned out ok. Wondering if the Ferritin has something to do with the hair loss, or what is causing the high ferritin. Any advice would be appreciated. Hair loss continues. Thanks for any insight on this issue.