Skin Conditioning
TETRAPEPTIDE-109
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A numbered four-amino-acid peptide used in skin-conditioning formulas. Gentle, supplier-evidenced.
Tetrapeptide-109 is an INCI-numbered proprietary tetrapeptide. Class-level, tetrapeptides have a long safety track record — several (e.g., acetyl tetrapeptide-5, palmitoyl tetrapeptide-7) have published independent data. For this specific numbered grade, efficacy support comes from the supplier and no CIR or SCCS monograph exists. Typical use: ppm to sub-percent in leave-on skincare.
Function
Skin benefits
- Skin-conditioning peptide
- Mild, well-tolerated
Known concerns
- No independent monograph
- Proprietary evidence
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related skin conditionings
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.