The route of administration changes the profile significantly in terms of absorption and risk
You might conclude that GHK-Cu is ineffective for your application, when in reality, you weren't even using active GHK-Cu to begin with
I think while peptides can be hormones, there are things like oxytocin, is sometimes called a peptide hormone
Glutathione is a critical intracellular antioxidant involved in neutralising free radicals, supporting liver detoxification enzymes, maintaining immune response, and protecting mitochondrial function
A particular relationship was established with the NO-system, and the advantage of the BPC 157 over the corresponding standard agents (i.e., corticosteroids, sulfasalazine, H2 blockers, anticholinergics, and proton pump inhibitors) which showed only weak, if any, effect on these fistulas closing (Klicek et al., 2008