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Gamma glutamyl transferase (GGT or GGTP, or Gamma-GT) (EC 2.3.2.2) is a liver enzyme. Its level in the blood may be tested for, as an elevated level may indicate an abnormality in the liver, though this can be caused by a number of conditions including: * congestive heart failure* cholestasis (congestion of the bile ducts)* cirrhosis of the liver* Restricted blood flow to the liver* Necrosis of the liver* Liver tumors* hepatitis* hepatotoxic drugs
... Why get tested?
To screen for liver disease; alcohol abuse; and to differentiate between liver and bone disease as a cause for elevated alkaline phosphatase (ALP)
When to get tested?
If your doctor thinks that you have symptoms of a liver disorder
Sample required?
A blood sample drawn from a vein in your arm
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Resources
- GGT (Lab Tests Online)

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