A blood test I had about 3 months back showed a ferritin level of 35 which is within the normal range. But I have increasingly thinning, brittle and shedding hair which is becoming a real problem now. Does anyone know if a reading of 35 is low enough to compromise hair health? The GP said my thyroid was also normal but is checking that again just in case it isn't now. I thought the hair problem might be menopausal but I've been on HRT for about 7 months now and if anything my hair is even worse :( My diet is OK apart from I don't have red meat.