Elpher,
I wish that I could answer that question for you! I as well have osteoprosis and have often wondered the same thing. I had osteopenia, and even taking the calcium didn't seem to stand up to the steroid injections I guess, because thats the only thing that I can think of for the reason that it went into osteoprosis so fast.
I do love these boards though. Everyone has a story or two, or three, or more and the information that is traded and the experiences shared, is so informative and lets you know that your not alone!
Take care and best wishes to you,
Bernie