← Stack analyses
Hair & Skin Matrix (GHK-Cu + AHK-Cu topical)
SkinComponents
Rationale
The topical copper-peptide pairing: GHK-Cu for skin remodeling, AHK-Cu marketed for the hair follicle. Community protocol: 0.5–2% formulations with weekly scalp microneedling, 8–12 week courses.
Evidence level
Cosmetic-grade human data for both (modest, formulation-dependent). Microneedling itself has real evidence for hair density. The injectable versions of either are a different risk class entirely.
Caution
Keep this one topical: the moment these go into vials, the risk-benefit inverts. Also watch total copper load across products and avoid stacking with strong acids/vitamin C in the same application window.