igf-1 lr3 stacking protocols bodybuilding vs HGH: Which Growth Enhancer Is Better? FASTEST Muscle-Building Peptides (Stay Lean):

Wei et al., 2019)

4 ROS and antioxidants: dual roles in cellular physiology ROS processes that affect GSH homeostasis are summarized here, as this determines the activation threshold of GSH-responsive nanomaterials

105 , e2134e2144 (2020)

Other (less serious) concerns are if EGF can properly penetrate the skin (as it is a medium-sized, polar molecule, so a special delivery system is probably needed), if it can affect collagen synthesis (or just works on the surface plumping up only the upmost layers of the skin) and if it has beneficial effects at all when used in isolation versus when used in a "conditioned media" that contains lots of growth factors resembling the synergistic balance found in the skin