Hi redlo,
I have a couple of questions if you don't mind. Was the DXA you're using as baseline done before or after Fosamax? Also, when was the CTX of 750 measured? From what you wrote earlier, I wasn't completely sure of the timing.

It's quite possible that prior Fosamax use is contributing to the lack of measurable BMD change so far, even your bone markers showing good anabolic activity with Forteo. If you happen to get a newer P1NP at some point, would you mind keeping us updated?

Just to share my own experience: my response to Forteo was on the slower side too. After 13.5mo, my lumbar spine BMD was up about 4.9%, but there was essentially no change in BMD at the hips or femur necks. My P!NP at 13.5mo was very high (400+) showing great anabolic response btw. It wasn't until the second year and well into the antiresorptive phase when I saw much more noticeable BMD improvements across all sites. And that was without any prior treatment before starting Forteo.

From what I've read, newly formed bone matrix (osteoid) could take time to fully mineralize, so DXA changes could lag behind the responses we see in bone markers. In that sense, a flat scan results at this stage doesn't rule out meaningful improvement underneath.