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Even a recent 2026 review concludes the same thing that GHK-Cu appears safe but the evidence is largely preclinical and comprehensive human RCTs are lacking (Wojcieszuk et al., 2026)

This chemical process builds peptides one amino acid at a time

NAD+ supplementation (via NAD+, NMN, or NR) addresses the NAD+ deficit by adding more precursor substrate from outside the cell

Expanded Clinical Pathways Category 1 status would provide clearer regulatory footing and could enable structured, compliant prescribing pathways

Research suggests that GHK-Cu may: Support collagen synthesis Improve skin elasticity Encourage elastin production Promote wound healing Reduce oxidative stress Modulate inflammatory responses Laboratory and clinical studies have reported topical GHK-Cu is efficacious for improving skin appearance