GHK Cu Peptide: What It Does for Body Composition and Metabolic Health 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 The Best Injection Sites for GHK Cu Peptide Therapy The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline