I had been experiencing hair loss for about a year and a half when I finally found out it was ferritin. In May this year, my ferritin was 22, and in August after taking iron supplements daily it was 36. I continued the supplements and noticed that in early November, the shedding went back to consistently "normal" amounts. In other words it took about 6 months of supplementation to stop shedding, which seems typical. However, I don't see any regrowth yet. I had an appointment with a dermatologist in late November who thought the hair loss was both due to low iron and androgenetic alopecia. So I am on spironolactone 100 mg and Rogaine 5% foam for that, but I do notice that the shedding rate went back to normal before I even started the spiro + rogaine, so I kind of hope the loss is mostly from the low iron because that seems to have more chance of regrowth!! Will have to wait and see! I have my doubts about the Rogaine because it seems like it only deals with the symptoms and not the cause, but I'm trying it out, I guess. So, my question is, if you had hair loss due to low iron/ferritin, when did you start to see regrowth?