Thanks @bunky44. By the way, I was taking the advice of the alternative type doctors for years and taking many of the supplements they recommended. A big one was turmeric, for prevention of Alzheimer's Disease. Taking that religiously, my husband still developed Alzheimer's. Also we were on plant based diet to reduce inflammation and I followed guidance on preventing osteoporosis, all for naught it seems. I avoided mainstream medical practitioners as much as possible, but with the onset of conditions that could not be ameliorated without science, like a leaky heart valve and now, Giant Cell Arteritis, I decided to put more trust in physicians I respect; hence, my decision to try alendronate for now. By the way, the use of strontium to build bone is controversial as it allegedly tricks the dexa scan. I plan to research it more. A good website for checking on supplements is http://www.examine.com as they review and report on studies done and do not endorse any products. That's it for now. Will post again if I find anything of interest. Best to you.