So... just curious, if you have low ferritin and normal TSH, you should have additional tests for thyroid? I don't have a reason yet for my hair loss, but have ferritin of 8! My doctor has only checked TSH only and of course I was told "you are fine, TSH is normal, you hair loss is probably due to stress". I'm new to all this, but am aware that ferritin plays a role in hair growth. Thanks!