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Peptide

Acetyl Tetrapeptide-5

A targeted peptide that helps reduce the appearance of under-eye puffiness, improve skin smoothness and elasticity, and promote a firmer, more refreshed-looking eye area.

Key Benefits

  • Helps reduce the look of under-eye puffiness
  • Supports a smoother eye contour
  • Helps improve the look of fatigue
  • Complements firming eye formulas
  • Supports antioxidant-focused care

How It Works

Acetylation helps modify the peptide's stability and formulation behavior. Supplier research proposes that the molecule influences processes associated with fluid accumulation, glycation, and capillary permeability in the eye-contour area.

In a published human-skin-fibroblast study, a four-peptide mixture containing Acetyl Tetrapeptide-5 reduced oxidative-stress markers and supported hydroxyproline and elastin-related measurements. Because multiple peptides were combined, the study does not prove the same effects from Acetyl Tetrapeptide-5 alone.

Visible improvement also depends on the complete eye formula, including humectants, film formers, emollients, and cooling effects. Results are gradual and cosmetic.

Ingredient Details

INCI Name: Acetyl Tetrapeptide-5

Ingredient Type: Targeted Cosmetic Peptide

Best For

Puffy-looking under-eyes · Tired-looking eye contours · Fine lines caused by dehydration · Most skin types · Daily eye-care routines

Research

In-vitro study: An Acetyl Tetrapeptide-5-containing peptide mixture in human fibroblasts →

What It Is

An acetylated tetrapeptide used mainly in targeted eye care. It is a small synthetic signaling-style ingredient, not a muscle relaxant, injectable treatment, or medication.

What It Does

Helps the under-eye area appear smoother, firmer, and less puffy as part of a well-designed eye formula. Evidence supports cautious cosmetic positioning rather than medical claims.

Acetyl Tetrapeptide-5 FAQs

Common questions about this ingredient in skincare.

What is Acetyl Tetrapeptide-5?
It is a synthetic four-amino-acid cosmetic peptide commonly used in eye products targeting the appearance of puffiness and fatigue.
Does it permanently remove eye bags?
No. Eye bags may involve genetics, fat pads, anatomy, allergies, sleep, and fluid retention. A topical peptide may improve appearance but cannot permanently alter structural causes.
How quickly can results appear?
Supplier studies often describe changes over several weeks. Results vary and depend on the peptide level, vehicle, consistency, and cause of puffiness.
Can it help dark circles?
It may improve dark circles related to puffiness or visible fatigue, but it is unlikely to correct all pigmentary, vascular, or structural causes.
Can sensitive eyes use it?
Peptides are often formulated gently, but the complete product can still irritate. Avoid direct eye contact and patch test if you are sensitive.
How strong is the independent evidence?
Independent ingredient-specific clinical evidence is limited. Published research includes peptide mixtures, so claims for Acetyl Tetrapeptide-5 alone should remain conservative.
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Products Featuring Acetyl Tetrapeptide-5

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