A co-worker of mine has hair that grows like crazy. She will cut it short, and before you know it, its long again! I asked her about this one day, and she said her secret is that she takes pre-natal vitamins. I guess it must be the iron or whatever. I decided to give it a try and my hair is half way down my back now, and so many people have commented on how fast it grew.
Just thought I would share.