Thank you @windyshores. It must have been in Great Bones where I read about Tymlos after Forteo. And thank you for sharing the study. I agree that it's very hopeful, though the combined treatment shown to be the most effective, would be incredibly expensive. Can you imagine what the side-effects could be when taking both at the same time?

In the Interpretation of that study it states, "In postmenopausal osteoporotic women switching from teriparatide to denosumab, BMD continued to increase whereas switching from denosumab to teriparatide results in progressive or transient bone loss."

For anyone who doesn't know about it, or is interested in learning more, this randomized control trial is cited and further explained in the recorded presentation that Dr. Benjamin Leder gave at the Cleveland Clinic about a year ago. The recording which is often referenced in this support group, is titled "Combined and Sequential Approaches to Osteoporosis Therapy". It can be viewed on YouTube.
Here's the link: https://youtu.be/WXoz1NeUgg8?si=Ka8vNnzsjDc9TZXA

It's a bit technical in parts, but well explained and very informative.