If you must freeze (to preserve excess), accept that some potency loss will occur and that portion should be used more quickly once thawed
Freezing powder at -20C provides optimal long-term storage approaching 24 months, but freezing liquid reconstituted GHK-Cu destroys the peptide through ice crystal damage
Specifically, we direct readers to the 2025 Medicare CQM Checklist for Shared Savings Program Accountable Care Organizations, which is posted in the QPP Resource Library at , and the Medicare Shared Savings Program: 2024 Reporting eCQMs, MIPS CQMs, and Medicare CQMs in the APP (guidance document), which is posted in the QPP Resource Library at , for resources and support for reporting eCQMs, MIPS CQMs, and Medicare CQMs
For active wounds or fresh scars, apply copper peptides twice daily
The concerns are formulation-level: copper ions can potentially destabilize some retinoid formulations, and layering both in one application step can increase irritation risk in sensitive users