GHK is promising biology, not magic medicine., Most real human data is topical, not systemic., And there are people where caution matters:, Active or recent cancer, Copper imbalance or metabolism GHK Cu: The Peptide That Supports Healthy Aging GHK Cu (copper peptide) is naturally occurring in the body and plays a role in supporting skin health, collagen production, and tissue repair. As The Peptide Craze Ground Truths BPC 157, TB 500, and GHK Cu: Separating Fact from Fear in Cancer Concerns Gabriel Alizaidy, MD, MS posted on the topic LinkedIn