Gamma-Glutamyl Transferase (GGT)
A sensitive liver and bile-duct enzyme, and the most specific way to confirm where elevated alkaline phosphatase is coming from.
Consider this test if:
- An elevated alkaline phosphatase needs to be traced to liver versus bone
- Investigating abnormal liver enzymes, fatty liver, or right-upper-quadrant symptoms
- Monitoring liver health during heavy alcohol use or a period of abstinence
- Tracking liver response in metabolic conditions such as obesity or diabetes
- Following up jaundice, itching, or other signs of impaired bile flow
- HSA/FSA eligible
- Typical results in 1 day · Reviewed by a real clinician
- Drawn at a CLIA/CAP-accredited lab near you ·
Pre-test considerations
Fasting for about 8 hours before the draw is preferred. Recent alcohol intake can raise GGT, so the result reflects drinking in the days before the test. The anti-seizure medications phenytoin and phenobarbital cause false elevations; if you take either, leucine aminopeptidase or 5'-nucleotidase is a better alternative. Note any liver-affecting medications or supplements for interpretation.
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What this test is for
Gamma-glutamyl transferase (GGT) is an enzyme concentrated in the liver and bile ducts that rises when bile flow is obstructed or liver cells are stressed. High GGT points to cholestasis, bile-duct obstruction, fatty liver, hepatitis, cirrhosis, and the liver effects of heavy alcohol use, and it tends to be the most sensitive of the routine liver enzymes for biliary problems. Its main practical use is sorting out an elevated alkaline phosphatase: GGT comes from liver and bile, not bone or placenta, so a high alkaline phosphatase with a high GGT confirms a liver source rather than a bone source. GGT also tracks alcohol intake well, which makes serial measurements useful for distinguishing continued drinking from abstinence, though some heavy drinkers have normal levels. It rises with increased body mass, fatty liver, and certain medications, so the result is read alongside ALT, AST, alkaline phosphatase, and bilirubin.
- Specimen
- Serum or plasma
- Measures
- Enzyme activity
What you'll learn
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Insights that connect the dots. A clinician reads your whole picture, not one result in isolation, connecting family history, past results, and lifestyle into clear next steps.
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Your personalized action plan. Nutrition, supplements, and training in one clinician-reviewed protocol, updated as your results change.
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Track your trends. Upload results from any lab and see each biomarker trend over time, so you know what is working.
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Never miss a recheck. Mito tells you what is worth retesting and when, then reminds you so nothing slips.
What to expect
- 1 Book instantly
Click, book, done. Choose a convenient lab location near you. Transparent, up-front pricing.
- 2 Quick lab visit
Testing to fit your busy schedule, usually 15 minutes or less. Walk-in and appointments available.
- 3 Typical results in 1 day
Your results post straight to your dashboard as soon as the lab completes them.
- 4 Expert guidance
Included with Mito membership. A clinician reviews your results and your personalized action plan follows, with clear next steps.
Everything your health needs,
in one membership
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Every test at our cost
Members pay our cost on every test, with lab fees passed straight through. The full receipt is itemized, never padded.
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Continuous tracking, all in one place
Upload past labs and watch your trends over time. Every marker and visit lives in one longitudinal record, so all your care stays together.
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Year-round clinician support
Text anytime and get clinician-reviewed answers. When you want to go deeper, 1:1 consultations are available at affordable rates.
All for $9/month
Order any test or consult without joining. For $9/month, members unlock member prices, trend tracking, and year-round clinician guidance.
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Frequently asked questions
View all FAQsHow does pricing work?
Every test shows the member price next to the standard non-member price, so you can see what membership saves you. The member price is our cost, covering the lab and what it takes to run the service. It is never a profit on the test itself. Mito makes its money on the $9 membership, not on marking up your tests. Membership is $9 per month, and any applicable lab order or draw fee is itemized before you pay.
Where do I get tested?
Choose an available partner lab at checkout. If your cart contains multiple blood tests, Mito helps consolidate the eligible tests at one lab when possible. At-home kits and scans follow the collection or appointment process shown on their product page.
Is this eligible for HSA/FSA?
Yes. Eligible tests can be paid for with an HSA or FSA card at checkout.
When will I get my results?
Your results appear in your Mito dashboard after the laboratory completes processing. A clinician then reviews them before your analysis and personalized action plan are finalized. Timing varies by test, and specialty assays and at-home kits may take longer.
Do I need a physician's order?
No. Mito provides the laboratory order when one is required, so you do not need to arrange a separate physician visit before purchasing.
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