Hair loss

Patient: I am 23 year old female. i have excess hairloss.. 300 hairs a day..i consulted a doctor after seeing my reports he told me i have ferritin levels low-21 and iron serum 38.he told its Andro genetic alopecia. he insisted me on using fefol z and foliglo.. i have been using these capsules but it couldnt help t control the problem.. i use to have thick hair plz suggest me if i would get the thickness back.. wat should the level of feritin for good hair?? for how many months i should take the supplements?