GH test info

GH stimulation tests help to diagnose hypopituitarism. For a stimulation test, a sample of blood is drawn after you have fasted for 10-12 hours. Then, under close medical supervision, you are given an intravenous solution of insulin or arginine. Blood samples are then drawn at timed intervals, and GH levels are tested in each to see if your pituitary gland was stimulated by the insulin (or arginine) to produce expected levels of GH. info from this site.