I never knew about the CTX blood test until I read about it on this site. I went to my bloodwork and looked at the trends and the numbers. My endocrinologist failed to mention this test and it does seem to be important. I am 67 years old my osteo numbers have gotten better because I am doing bio, identical, hormones, resistance, training, vitamins, etc., my CTX number now stands at 300. The norms on the blood test say anything above 1300 is considered a significant bone turnover am very new to this. If there’s anything you could shed light on I would appreciate it. I looked at my trends over the last 10 years, and they have dropped significantly , the highest was 810 years ago and now 300. They wanted to put me on Polea 10 years ago and I refused that’s when I really ramped up exercise Pilates, vitamins, and my nutrition. Two years ago I went on for two months and had such horrific side effects. I said never again I wound up fainting etc. it was a nightmare, any information on this I would greatly appreciate. I did ask my integrative medicine doctor to also include the P1NP for my bloodwork this month. Thank you for anybody that knows anything about this