ZRT labs does a test for IGH-I (Insulin Growth Hormone). They would tell you according to your age and such if the Hormone level is in a normal range. I have used them before to test my estrogen hormone levels. www.salivatest.com You would find it under blood test. I have never done this one but if some one trys it.. let us all know how it turns out. Has anyone had it done in their Drs office? Mine hasn't.