Peptide
Acetyl Tetrapeptide-9
A peptide that helps support firmer, smoother-looking skin.
Key Benefits
- Supports firmer-looking skin
- Helps improve the look of skin density
- Promotes smoother texture
- Complements age-supportive formulas
- Helps soften the appearance of fine lines
How It Works
Ingredient Details
INCI Name: Acetyl Tetrapeptide-9
Ingredient Type: Peptide
Best For
Mature skin · Loss of firmness · Fine lines · Preventive age-support routines
What It Is
What It Does
Acetyl Tetrapeptide-9 FAQs
Common questions about this ingredient in skincare.
What is Acetyl Tetrapeptide-9?
It is an acetylated synthetic tetrapeptide used in skincare formulas intended to support firmer, smoother and denser-looking skin.
How is it thought to work?
Mechanistic and supplier data link it to lumican and collagen organization, but direct independent clinical evidence for the peptide alone remains limited.
Does it replace collagen?
No. It is not collagen and does not physically replace lost collagen. It is used as a cosmetic signaling ingredient.
Can it be used with retinol or vitamin C?
Generally yes. Peptides can complement retinoids and antioxidants, though tolerance depends on the complete products and routine.
Is it suitable for sensitive skin?
Peptides are often well tolerated, but any finished formula may irritate. Patch-test first if your skin is reactive.
How long does it take to work?
Visible firming or smoothing, if achieved by the complete formula, usually requires consistent use over several weeks rather than a single application.
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Products Featuring Acetyl Tetrapeptide-9
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