The tripeptide GHKCu complex ameliorates lipopolysaccharideinduced acute lung injury in mice Oncotarget 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 Helloskin GHK Cu 1% Triple Peptide Regenerative Serum The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline