**Note: All laboratory testing requires an authorizing physician. DHA Laboratory offers a Patient Direct Program that partners you with an authorizing physician. If you have any additional questions regarding the availability of testing, please contact our laboratory by telephone or email.**
GGT is used to determine why a patient would have elevated levels of alkaline phosphatase or also known as ALP. This test would be recommended for any patients with disease associated with the bile duct, and also for patients who have liver or bone disease.
Patient Preparation: Patient should fast for 8 hours prior to collection of the specimen.