If you are going to do that, I would get the P1NP and CTX blood tests beforehand as a baseline. Then, check them in six months - no need to wait for a year. You can see if what you are doing is having an effect. If you see CTX going up, that's a sign that you may be getting worse.

Remember that it's important to have those tests first thing in the morning, fasting. CTX in particular can vary wildly during the day.