My hair started thinning when I was 44 and continued for almost 4 years. As soon as I noticed it, I went to see a dermatologist, who did nothing, and then I went to see an endocrinologist who specialized in female hair loss. He diagnosed me with androgenic alopecia and put me on spironolactone, a blood pressure medication (a diuretic), as another poster mentioned, which has the secondary effect of neutralizing testosterone in your system. In my case, he believed hypothyroidism and falling estrogen levels were the cause (throwing off the balance of estrogen to testosterone). He put me on thryoid medication and although I was already taking birth control pills, he changed the brand/type I was on because some b/c pills mimic testosterone in the system, and he also had me take them continuously, coming off of them for only a few days every six months, in order to keep the estrogen levels in my system more consistent. At first, there didn't seem to be much improvement, and so he added Propecia (which is usually not prescribed for women, especially if you plan to get pregnant), but after six months of no improvement, I decided to stop taking it since I didn't really feel comfortable taking it in the first place. He raised the dosage of the Spironolactone from 100 mg to 200 mg/day and after about a year on that dosage, I started to see less hair in my brush and in the drain. Within 2 years, my hair loss was almost back to what would be considered normal, and after 3 years, I stopped the Spironolactone altogether. While going through the medical side of treatment, I was also supporting hair regrowth by taking vitamins for hair, not subjecting my hair to any chemical treatments, and using shampoos/conditioners that helped make my hair appear a little thicker, along with improving my diet, exercising and trying to minimize stress. The journey through that 4 years was up and down...things would improve and then get worse again--the doctor warned me that hair loss is cyclical--but eventually, it evened out and stayed fairly stable. Today, at 53, even after stopping the b/c pills and going through menopause, my hair looks pretty good, the thin spots have filled in and I'm able to color it and wear ponytails again. BTW, my sister has had alopecia areata and was successfully treated with scalp injections, although the hair that has grown back is very fine and a different texture from the rest of her hair. For women, hair loss can be devastating. I wish everyone the best in finding a treatment that works for them.
. Few years after that my hair did grow healty. I also believe fish oil-cord liver oil also helps as it has Omega 3 in it and helps hair grow healthy and shiny. Dont always think about your hair. be busy in other things. Hope all the best for you. 
