All About GHK Cu Peptide More Than Just Cosmetic YouTube The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline If your GHK Cu or MOTS C injection leaves welts and burns like a hornet, it's usually not the peptide it's the technique. A few small tweaks can turn a sting into almost GHK Cu Peptide: What It Does for Body Composition and Metabolic Health