Acetyl Octapeptide-3

Acetyl Octapeptide-3 is a synthetic signal peptide used in anti-aging products at very low concentrations (typically well under 0.1–0.5%) and is not pH-dependent or inherently exfoliating/keratolytic. Clinical experience and patch-test data for cosmetic peptides generally show low irritation and low sensitization rates, with occasional stinging or erythema in highly reactive or barrier-impaired skin. Given the vulnerable population risk but overall benign profile at typical use levels, it fits best as very gentle rather than truly inert. Safety Notes: In commercial leave-on anti-aging serums/creams, acetyl octapeptide-3 is commonly supplied as a dilute peptide solution and is frequently dosed at very low active levels (~0.0005–0.005%) in multi-peptide blends or “wrinkle relaxing” products. Higher-strength consumer-available targeted serums and ampoules have been marketed at up to ~0.05% active for a single-peptide focus, with practical limits driven by cost and stability/compatibility rather than regulatory caps (no specific FDA/EU maximum for this cosmetic peptide). Rinse-off use exists but is uncommon and typically sits at the low end due to short contact time.