@hollygs well thanks to you I learned something. This question about CTX and NTX is quite complicated. They do move in the same direction, from what I can understand, but the NYX increase is transient(up for 24 hours) and followed by a decrease (14 days). This linked study also says CTX moves "in the same direction." https://pmc.ncbi.nlm.nih.gov/articles/PMC3536955/

Over the years I have always read that Forteo and Tymlos raise CTX and P1NP. Apparently that is an oversimplification.

There isn't a whole lot on NTX using my browser!

I am going to ask my doctor about this. This info if reliable seems very important since we are looking at guidance from bone markers. This may be one reason my doctor doesn't use them and said that an entire conference could focus on them. Chances are the timeline for increase and decrease varies from individual to individual too, along with all the other factors that we know influence CTX.