GH levels and blood glucose levels are connected. In people without acromegaly a higher blood glucose level causes the body to stop producing GH. The blood levels are purposely raised using an oral glucose tolerance test to watch GH levels to respond.
75 grams of glucose after a fasting sample will be given to the patient. Over the course of next two hours (varies according to the clinician’s advice), 30,60,90 and 120 minutes glucose levels are tested.
Interpretation:If GH levels don’t drop to below 1ng/ml,this means the patient has acromegaly, because the GH levels wıll have to respond to the amount of glucose in the blood.
Sample: Arm vein blood.
Working day: Everyday
Result Time: Each sample after 1 hour.
