Frontiers Dual Characters of GH IGF1 Signaling Pathways in Radiotherapy and Post radiotherapy Repair of Cancers The growth hormoneinsulin like growth factor I axis in the diagnosis and treatment of growth disorders in: Endocrine Connections Volume 7 Issue 6 (2018) The Peptide Craze Ground Truths Peptide Therapy for Skin Rejuvenation LIVV Natural Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference