Popular peptide actives in body care include palmitoyl tripeptide-1 and palmitoyl tetrapeptide-7 (together in Matrixyl 3000), acetyl hexapeptide-3 (Argireline), copper peptides (GHK-Cu), and body-specific peptides targeting elasticity or firmness. Use concentrations typically range from 0.5% to 5%. A skilled cosmetic chemist must balance peptide stability against the emulsion pH and preservation system.
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