I was on Forteo, daily injections for two years. It was very expensive. In my case it did not stop the progression of my bone density loss. I did have rheumatoid arthritis years ago and what did me in was a long term treatment of prednisone which damages your bones. Forteo may work for others, but it did not for me.
By the way, I stopped eating red meat and that is how I ended my rheumatoid arthritis, but the damage was done.