What is this test?
Osteocalcin is a protein produced by cells that build bone. It serves as a marker for bone formation.
Why might it be ordered?
- To assess bone turnover in certain metabolic bone diseases.
- To monitor the effect of osteoporosis treatment when the specialist prescribes it.
What sample is needed?
A healthcare professional collects a venous blood sample. Depending on the method, the laboratory uses serum or plasma.
How should you prepare?
Bone markers can change during the day. For follow-up, use similar time and conditions as directed by the laboratory. Tell the laboratory about all medicines, hormone treatments, vitamins and supplements you take. Do not stop or change treatment unless your clinician tells you to. Follow any instructions about fasting and the time of collection.
How should you understand the result?
An abnormal result indicates altered bone turnover, but does not directly measure bone density or prove osteoporosis on its own. Your result is interpreted using the reference interval on the laboratory report and in the context of your symptoms, medical history and other test findings.
Sources and editorial status
This patient-facing text is an editorial draft. It should be approved by a laboratory physician before official publication.