Question about ferritin levels

[Dianyla]

I hadn't heard about the target range of 70. I have heard of a target range of about 50 for athletes and women, that I'm always shooting for.

I have to work really hard just to keep above 30 despite heavy menstrual losses. When I went in 2 years ago feeling like total crap it was 12, the lowest readable value in the range. My doctor said that when ferritin levels are below 15, it's a fairly good sign that your marrow stores are completely depleted. I feel much better now that I mostly keep it above 30. Below 25 is typically considered "low normal".

ETA: If I were you, I'd try to find a doctor who is knowledgeable about thyroid issues. That is a much more likely cause of hair loss, considering that your ferritin levels are ~40. Most primary care docs only do a single test (TSH) for thyroid function and that test often misses some critical details.