Gamma-Glutamyl Transferase (GGT) Blood Test

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Feature	Labcorp	Quest Diagnostics
Price	$5.99	$4.99
Results in	~2 business days	~5 business days
Sample type	Blood Serum	Blood Serum
Require fasting	Yes	No

About the test

This test measures gamma-glutamyl transferase (GGT), an enzyme produced primarily in the liver. GGT is used in the diagnosis and monitoring of hepatobiliary diseases.

Included biomarkers & Reference ranges

Biomarker	Reference range
Gamma-Glutamyl Transferase (GGT) Gamma-glutamyl transferase, a liver enzyme sensitive to bile duct problems and alcohol use, often used alongside other liver tests.	3–85 mg/L

Reference ranges vary by lab, age, and sex (M/F). Your report shows your exact range. Click any biomarker to see its optimal range and what your results mean.

Preparation

If you are taking phenytoin or phenobarbital, please consult your healthcare provider before collecting your sample. These medications may cause falsely elevated results.
Fasting for 8 hours before collection is required.
Fasting before a blood draw means you don't eat or drink anything except water.
Your doctor should provide any special instructions related to fasting for your test. Always follow your doctor's instructions.

Quest Diagnostics lists no special preparation for this test.

How it works

1. Order online No referral or insurance
2. Get a requisition By email in 24–72 hours
3. Visit a draw center Bring a matching photo ID
4. Get results Securely by email

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Consultations

Not sure how to read your results? We can help.

Schedule a consultation with a Hormunity specialist. We’ll walk through every marker, interpret what it means for you, and map out the next steps for your care.

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