The most popular options are Matrixyl 3000 (palmitoyl tripeptide-1 and palmitoyl tetrapeptide-7) for anti-aging claims, Argireline (acetyl hexapeptide-3) for expression-line softening, and GHK-Cu (copper tripeptide-1) for regenerative positioning. Your cosmetic chemist at the contract lab will advise on effective use-level ranges, typically 1–5%, and pH compatibility with the gloss base.
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