Gamma glutamyl transferase

ChemistryAlso known as: GGT 24h Ur-cRateAlso known as: GGT Amn-cCncAlso known as: GGT DBS-cCncU/L

The activity level of the enzyme GGT in your urine.

Normal Range

3 – 70

U/L

Abnormal Levels

< 1 U/L

> 70 U/L

Specimen Type

Blood

Why This Biomarker Matters

Elevated urinary GGT can indicate kidney disease or metabolic dysfunction, helping doctors assess kidney health and identify disorders requiring further investigation or treatment.

Optimal Ranges

Clinician-defined 4-point reference thresholds (U/L)

Default Range

Low

1 U/L

Borderline Low

3 U/L

Optimal

30 U/L

Borderline High

70 U/L

Overview

Gamma-glutamyl transferase (GGT) is an enzyme involved in amino acid metabolism. Urine GGT levels reflect kidney function and may indicate kidney disease or metabolic disorders. Elevated urinary GGT can suggest kidney tubular damage, certain genetic metabolic disorders, or systemic conditions affecting the kidneys. This enzyme is also found in the liver, so combined with liver function tests, it can help identify liver and kidney disease. Urine GGT testing is less common than serum testing but provides information about kidney-specific enzyme activity.

Technical Information (LOINC Codes)

Standardized laboratory codes for this biomarker

2324-2Primary

Gamma glutamyl transferase [Enzymatic activity/volume] in Serum or Plasma

U/L

27403-5

Gamma glutamyl transferase [Enzymatic activity/volume] in Urine

U/L

2323-4

Gamma glutamyl transferase [Enzymatic activity/volume] in Semen

U/L

17858-2

Gamma glutamyl transferase [Enzymatic activity/volume] in Body fluid

U/L

2322-6

Gamma glutamyl transferase [Enzymatic activity/volume] in Amniotic fluid

U/L

53432-1

Gamma glutamyl transferase [Enzymatic activity/volume] in Dialysis fluid

U/L

58768-3

Gamma glutamyl transferase [Enzymatic activity/time] in 24 hour Urine

U/(24.h)

96593-9

Gamma glutamyl transferase [Enzymatic activity/volume] in DBS

U/L

Available Lab Tests

Order tests that measure this biomarker

Gamma glutamyl transferase

Why This Biomarker Matters

Optimal Ranges

Default Range

Overview

Technical Information (LOINC Codes)

Available Lab Tests

Advanced Liver Health Basic

Advanced Liver Health Comprehensive

Gamma Glutamyl Transferase (GGT)

Hepatic Function Panel with GGT