A Theoretical Link Between the GH IGF 1 Axis and Cytokine Family in Children: Current Knowledge and Future Perspectives 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 GHK Cu The Doctors Protocol in current Clinical Use , DISCLAIMER, The information shared in this video is for educational and informational purposes only and is based on research, and general Mechanisms of Disease: metabolic effects of growth hormone and insulin like growth factor 1 Nature Reviews Endocrinology Effects of Copper Tripeptide on the Growth and Expression of Growth Factors by Normal and Irradiated Fibroblasts Jeffrey D. Pollard, Susan Quan, Thomas Kang, R. James Koch, 2005