N-Telopeptide

Hi @dvargo, my endo orders CTX for me. But I’ve read some endos do NTX.

Was your NTX test done using urine or blood? Did your lab report include a reference range? Also, what units are listed next to your results?

I am not on medication. I just wanted to see the rate of bone turnover. Hospital Lab; Urine test with fasting. It says Ntx Urine BCE/mM Creatine 48., post menopausal range 26-124. Then it says Creatine , Urine per volume 140 mg/dl. Functional Dr. and Internist say I am good, but I have no idea how to read this and the people at Osteostrong cannot discern this as well.
At another Lab Quest same month: Women with a baseline NTx value greater than 38 are at significant risk for decrease in BMD. This is a ratio. My ratio was 35 in 2024 and now 28 in 2025. So confusing.

From what I understood, the most commonly used unit for urine NTX is nmol BCE/mmol creatinine, representing a ratio of BCE to creatinine. Quest Lab has a reference range listed as 4-64 nmol BCE/mmol creatinine for premenopausal women. Your 35 and 28 readings fall right in the middle.

You mentioned, "At another Lab Quest same month: Women with a baseline NTx value greater than 38 are at significant risk for decrease in BMD". Was this statement included in your lab report, or was it a conclusion provided by your healthcare provider?

In your original message in this thread, you mentioned value of 265 and 240. Are those also uNTX results? If so, what are the units?

Statement included in lab report. 265 and 240 are the NTX results and it doesn't say units.

The readings in the 200s (265, 240) seem to differ significantly from the other lab results. If all of these are NTX labs and the measurement units are consistent, I'd definitely ask the prescriber to investigate further. However, if different units were used, that could explain the variation. Just my two cents.