Acetyl Tetrapeptide-9
A peptide active. The maker links it to firmness and skin renewal; independent data are limited. Well tolerated.
Evidence by route
Topical application
A peptide active. Well tolerated; independent data limited.
- CIR Cosmetic Ingredient Review safety assessment
How to read tiers A–F
- BLimited evidence. One RCT or several controlled studies with limitations
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
Acetyl Tetrapeptide-9 (INCI: Acetyl Tetrapeptide-9) is a synthetic short-chain peptide used as an active. In a formula the manufacturer links it to firmness and skin renewal, via a presumed support for dermal matrix proteins. Caution applies here. Signaling peptides are a promising field, but independent data on this specific peptide are scarce, and much of the claim set comes from the supplier. It is reasonable to expect a supporting role within an anti-aging formula, without big promises of a stand-alone effect. Applied topically it has no systemic relevance, so it can be used during pregnancy and breastfeeding. Tolerance is good, with low irritation and allergy potential. It does not clog pores and suits sensitive skin.
Frequently asked questions
Is Acetyl Tetrapeptide-9 safe during pregnancy?
Acetyl Tetrapeptide-9 is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Acetyl Tetrapeptide-9 for?
Acetyl Tetrapeptide-9 suits: normal, dry, combination, oily, sensitive.
What is Acetyl Tetrapeptide-9 and what does it do in cosmetics?
A peptide active.
What's the INCI name for Acetyl Tetrapeptide-9?
The INCI name is Acetyl Tetrapeptide-9.
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