I used Ultimate Bone Support years ago when my DEXA scan results showed I was in the osteopenia range. After two years of use, I had another scan and was back in the normal range. My physician was so impressed she started recommending this product to other patients. After awhile, I switched to a less expensive strontium supplement, which worked fine for several years, but now I'm back in the osteopenia range. So I'm using Ultimate Bone Support once again. I won't know for sure whether it's working until I get another DEXA scan in a year or two, but I'm confident that if it worked for me once, it will again.
On a negative note, there was a problem with my order, and when I emailed the company at their "feedback" address as well as the customer support representative I had been in touch with about it, I never received a reply. So I am disappointed with the company's customer service and hope this was a one-time, unusual failure to respond. Nevertheless, I do recommend this product and will continue to use it myself.