Is N telopeptide 21 high, normal or dangerous? What does N telopeptide level 21 mean?

📅 Medical Review Date: February 20, 2026

Your N telopeptide level of 21 is a High N telopeptide level.

High N telopeptide levels may indicate underlying health problems. The normal range is typically between 6.2 nmol BCE/L and 19 nmol BCE/L. If your levels are outside this range, it's important to speak with a healthcare provider. Consulting a doctor is recommended to determine the cause and appropriate next steps.

The normal N telopeptide range for men is :6.2 - 19 nmol BCE/L

Ideal values of N telopeptide depending on age (male) :

Age	Ideal N telopeptide value
<5 years	6.33
5-10 years	6.463
10-15 years	6.599
15-20 years	6.738
20-25 years	6.879
25-30 years	7.023
30-35 years	7.17
35-40 years	7.321
40-45 years	7.475
45-50 years	7.632
50-55 years	7.792
55-60 years	7.956
60-70 years	8.123
70-80 years	8.294
80-90 years	8.468
90-100 years	8.646
>100 years	8.828

*Ideal values are calculated based on our database of patient records

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Normal range of N telopeptide found among women :6.2-19 nmol BCE/L

Ideal values of N telopeptide depending on age (female) :

Age	Ideal N telopeptide value
<5 years	6.334
5-10 years	6.471
10-15 years	6.611
15-20 years	6.754
20-25 years	6.9
25-30 years	7.049
30-35 years	7.201
35-40 years	7.357
40-45 years	7.516
45-50 years	7.679
50-55 years	7.845
55-60 years	8.015
60-70 years	8.188
70-80 years	8.365
80-90 years	8.546
90-100 years	8.731
>100 years	8.92

If you take a N telopeptide blood test and the results are not in the normal range (6.2-19 nmol BCE/L), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

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How the N telopeptide Test Is Done :

When your doctor orders a N telopeptide test, it involves a straightforward blood draw to measure your N telopeptide levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your N telopeptide test results are usually available within a few hours.

Medical References

• PMC – Urinary N-telopeptide: The New Diagnostic Test for Osteoporosis
• Mayo Clinic Press – Monitoring response to osteoporosis treatment: What are bone turnover markers?
• Mayo Clinic Press – Beyond bone density: Checking the health of your bones
• WebMD – Know Your Osteoporosis Blood Test Markers
• PMC – N-telopeptide as a potential diagnostic and prognostic marker for bone metastasis