Have you considered taking Strontium? Both Amazon and iHerb now offer a variety of brands. They've been using it in Europe for a long time with much success for osteoporosis.

When I was diagnosed with osteoporosis a number of years ago, I took several of the prescription drugs, but they all disagreed with me. I researched the internet and found Strontium. The first year I took it, my bone density increased over 9%--my doctor couldn't believe it. Latter increases were not this dramatic, but I did get my bones back to the normal range. You cannot take it at the same time as calcium because they use the same receptors; however, this wouldn't be a problem for you as you don't take calcium anyway. At the time I looked into it, Doctors Best was the only brand available; now both Amazon and iHerb offer a variety of brands.