GGT blood test
A liver enzyme that is not raised by muscle damage, which makes it useful for telling liver strain from training.
- Typical range (adult men)
- below 65 U/L
- Panel
- Liver Function
- Also called
- Gamma-glutamyl transferase, Gamma GT
Reference ranges vary between labs; use the range on your own report. Results need to be read by a doctor alongside your symptoms and other tests.
Why it’s tested
If AST and ALT are high but GGT is normal, recent training is a likely cause; if GGT is high too, the liver is more likely.
What can raise it
- Alcohol
- Bile duct problems
- Liver strain from medication or compounds
What can lower it
- Usually not a concern
Getting an accurate result
- Test in the morning, especially for hormones, which run highest early in the day.
- Skip hard training for 48 hours before: muscle damage and creatine can push this up.
- Stay hydrated, and test at the same lab and time of day each time so results compare fairly.
Compounds that affect GGT
Monitored with these, based on their known properties:
- Dianabol (Methandrostenolone)
- Anadrol (Oxymetholone)
- Anavar (Oxandrolone)
- Winstrol (Stanozolol)
- Turinabol (Chlorodehydromethyltestosterone)
- Halotestin (Fluoxymesterone)
- Superdrol (Methasterone)
- Testolone (RAD-140)
- S-23
- YK-11
- Methyltrienolone (Oral Tren / Metribolone)
- 1-Andro (1-Androstenediol)
Other liver function tests
Questions
What is a normal GGT level?
A typical adult male reference range is below 65 U/L. Ranges differ for women, by age and between labs, so compare with the range printed on your report.
What does high GGT mean?
Common reasons include alcohol, bile duct problems and liver strain from medication or compounds. One result outside the range isn't a diagnosis: a doctor will look at it with your other markers and history.
What does low GGT mean?
Common reasons include usually not a concern.