I.M vs SubQ for Growth Hormone, the old adage of what's best? At therapeutic doses, I.M may produce a slightly higher and earlier CMax for GH level. But the overall exposure (AUC) I.M vs SubQ for Growth Hormone, the old adage of what's best? At therapeutic doses, I.M may produce a slightly higher and earlier CMax for GH level. But the overall exposure (AUC) HGH IGF 1 LR3 Stack: Dosages, Side Effects Insulin Like Growth Factor 1 (IGF 1) and Its Monitoring in Medical Diagnostic and in Sports JCI Leucine 973 is a crucial residue differentiating insulin and IGF 1 receptor signaling