The most commercially popular peptides in sheet masks are Matrixyl 3000 (palmitoyl tripeptide-1 + palmitoyl tetrapeptide-7) for anti-aging claims, Argireline (acetyl hexapeptide-3) for expression-line softening, and copper peptides (GHK-Cu) for skin-repair positioning. Concentration ranges vary by supplier, but effective use levels are typically 1–5% of the peptide solution, not the raw active. Always confirm your cosmetic chemist has stability data at the chosen concentration.
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