This independent UPLC-MS lab test confirms GHK-Cu 49.1mg from Direct Peptides at 99.48% purity. The analysis was conducted by Horizon Analytical on February 28, 2026. GHK-Cu is a copper peptide researched for its role in collagen synthesis, wound healing, and skin rejuvenation. A purity level of 99.48% indicates minimal contamination and high-grade synthesis. The full certificate of analysis is available for download on this page.
Submit your third-party lab test to help the community verify purity claims. Every report is reviewed before publication.