i am a forty five year old woman and i once had such long ,silky and healthy jet black hair which i could leave open at my will and tie it the way i want.i have even tried a lot of haircuts and have successfuly looked quite a stunner in them,but now i guess with age taking a toll over me my hair is growing at a very slow rate and because of that i am not being able to try out as any hairstyles that i used to try.what can i do to get my hair to grow fast in a healthy manner?