Originally Posted by AaronJackson
My GH levels came back low, yet my IGF-1 levels are normal. How can this be? And which one is the determinig factor in GH deficiency?
IGF-1 is produced by the liver to tell if it is getting GH. it produces it in response to the GH.
GH decreases with age so maybe for your age group your IGF-1 is normal.
Did the insulin tolerance test which is one of the ways to show if your actually producing the GH you need come out low? Did your doctor just do a simple blood test for GH? if so that really doesn't work. Has to be some sort of stress test like the insulin tolerance test to judge that.