The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline PDF) Regenerative and Protective Actions of the GHK Cu Peptide in the Light of the New Gene Data The tripeptide GHKCu complex ameliorates lipopolysaccharideinduced acute lung injury in mice Oncotarget GHK Cu Peptide: What It Does for Body Composition and Metabolic Health GHK Cu Peptide: What It Does for Body Composition and Metabolic Health 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK