Over active thyroid

I had an over active thyroid (graves). The thyroid was removed 2 years ago. As you know, an over active thyroid greatly reduces the hair growth. Since having the thyroid removed, I now take medication in place of the thyroid. My hair has been a this length (right below my ear lopes) for the past 5 years. I have not had a "hair cut" in over five years, the only thing I have done is a trim of split ends. I was wondering if Hair Formula 37 would help to make my hair grow. I would hate to "waste" that kind of money if because of the thyroid problem it would not work. Would appreicate any help you can give me. It is so dispressing when you have "terrible looking hair."

Thanks so much.
Gabriella