Not too big. Not too small. Because of their intermediate size, macrocyclic peptides combine the potency and precise targeting of an antibody or biologic therapy with the stability and ease of administration of a GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes Tachyphylaxis Understanding Rapid Tolerance Development In Pharmacology PPT Template ST AI PPT Example Biological efficacy of GHK Cu after ionic liquid loading. (a) Cellular Download Scientific Diagram Differences between Tolerance and Tachyphylaxis (Desensitization) in Pharmacology