The form of GHK Cu you use may matter more than the peptide itself. Which form of GHK Cu have you personally tried before and what was the FIRST noticeable change you experienced? PSA] Albeit rare Copper peptide "uglies" are real and scary. Case report and looking for advices : r SkincareAddiction Professor Dr Patrick Treacy has cautioned against the current hype surrounding peptides, emphasizing that aesthetic medicine must remain grounded in solid clinical evidence rather than marketing Epigenetic Mechanisms Activated by GHK Cu Increase Skin Collagen Density PracticalDermatology