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Osteocalcin (Bone-Globin Complex) in Serum or Plasma

Published: August 9, 2026Updated: August 16, 2026

This test measures a protein produced by bone cells, which helps assess bone formation and turnover.

Quick summary

["Osteocalcin reflects your body’s bone health and activity levels."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
36068-5
Short code
XR tomo C-spine
Synonyms
XR tomo C-spine
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
xr-tomography
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What Is Osteocalcin Used For?

Osteocalcin is primarily used to evaluate bone metabolism and diagnose or monitor conditions affecting bone formation, such as osteoporosis, Paget’s disease, or certain metabolic bone disorders. It can also help track the effectiveness of treatments for these conditions.

How Is This Test Performed?

A blood sample is drawn from a vein, usually in your arm. The blood is then processed to separate serum or plasma for testing. The lab uses an immunoassay method to detect and measure the osteocalcin protein.

Why Might You Need This Test?

Your healthcare provider may order an osteocalcin test if you have symptoms or risk factors for bone-related conditions, such as low bone density, unexplained bone pain, or if you’re undergoing treatment for a bone disorder.

What Do Results Mean?

Results can vary depending on individual health, age, and medical history. Higher levels may suggest increased bone formation, while lower levels could indicate reduced bone activity or resorption. Your doctor will interpret results in the context of your overall health.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Osteocalcin

Frequently asked questions

How often should I get this test?
The frequency depends on your medical condition and treatment plan. If you have a known bone disorder, your doctor may recommend regular monitoring. Otherwise, this test is usually ordered as needed for specific situations, such as evaluating symptoms or guiding treatment.
What are the normal ranges for this test?
There are no universally standardized reference ranges for osteocalcin because they can vary by lab and individual factors like age, sex, and health status. Your doctor will provide your specific results and compare them to your baseline or clinical context.
Can I prepare for this test?
No special preparation is usually needed, but avoid strenuous activity or excessive alcohol consumption 24 hours before the test. If you’re on medications, inform your healthcare provider beforehand.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy