A peptide active. The maker links it to firmness and skin renewal; independent data are limited. Well tolerated.
Topical application
BLimited evidence. One RCT or several controlled studies with limitations.
A peptide active. Well tolerated; independent data limited.
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.
Irritation potential
LowAllergen risk
LowPregnancy
SafeSuitable for
The Evigrade extension adds an evidence panel to iHerb, Sephora, Druni and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
Acetyl Tetrapeptide-9 is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
Acetyl Tetrapeptide-9 suits: normal, dry, combination, oily, sensitive.
A peptide active.
The INCI name is Acetyl Tetrapeptide-9. It may also appear as: Ацетил тетрапептид-9.
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