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Osteocalcin (Bone-Specific)

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

This test measures osteocalcin, a protein produced by bone-forming cells. It helps assess bone health and activity.

Quick summary

["Osteocalcin reflects new bone formation and can indicate bone metabolism changes."]

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

Key facts at a glance

LOINC
53641-7
Short code
OCT2 Ag Tiss Ql ImStn
Synonyms
OCT2 Ag Tiss Ql ImStn
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
immune-stain
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 turnover and diagnose conditions affecting bone health, such as osteoporosis or metabolic bone diseases. It can also help monitor treatment responses in patients with bone-related disorders.

How Is This Test Performed?

A blood sample is drawn from a vein in your arm. The sample is sent to a lab where it is analyzed using an immunoassay method to measure osteocalcin levels.

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms like bone pain, fractures, or if you’re at risk for conditions like osteoporosis. It may also be used during follow-up for patients on medications affecting bone health.

What Do Results Mean?

Results don’t provide a direct range, but elevated levels may suggest increased bone formation, while lower levels could indicate reduced bone activity. Your provider will interpret results in the context of your overall health and medical history.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Osteocalcin serves as a biomarker for bone formation activity. Elevated levels may signal hypercalcemia or excessive bone turnover, while decreased levels could suggest hypocalcemia or reduced bone formation in conditions like osteoporosis or vitamin D deficiency.

Short name

Bone Formation Marker

Frequently asked questions

What causes abnormal osteocalcin levels?
Abnormal levels can result from conditions like osteoporosis, Paget’s disease, or hyperparathyroidism. Medications, pregnancy, or certain metabolic disorders may also influence results.
How long does it take to get results?
Results are typically available within 1 to 3 business days, depending on lab processing times.
Can I eat or drink before this test?
You may eat and drink normally before the test, as it’s a blood draw and doesn’t require fasting.
  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