hair peptide ghk cu Male Restoration Before & After with PRF and GHK-Cu Massage gently Copper Peptide Hair Growth Serum

Current Chemical Biology 8(2):89-99. [doi.org]

Thats not a theoretical caution

Wound Healing and Tissue Repair Studies Multiple animal models rodent skin wound, diabetic ulcer analogs, and surgical wound healing have reported accelerated closure and improved tensile strength of healed tissue following topical GHK-Cu application [3][7]

Safety and Efficacy of Approved and Unapproved Peptide Therapies for Musculoskeletal Injuries and Athletic Performance

The result is a peptide with a half-life of 159 to 195 hours, roughly 7 to 8 days, making once-weekly administration possible

Medical disclaimer: No form of GHK-Cu is FDA-approved for any medical use