Acetyl Hexapeptide-8 is a synthetic cosmetic peptide widely used in anti-aging skincare products, especially those targeting expression lines and early wrinkles.
Basic Information of Acetyl Hexapeptide-8
1. Name and identification
- INCI name: Acetyl Hexapeptide-8
- Common name: Argireline
- Type: Synthetic peptide (cosmeceutical ingredient)
- Category: Anti-aging / wrinkle-reducing cosmetic active
2. Origin
- Developed by Lipotec (Spain) (now part of Lubrizol)
- Designed using peptide engineering techniques
- Modeled after a fragment of the SNAP-25 protein, which is involved in neurotransmitter release
It is not naturally extracted, but fully laboratory-synthesized.
3. Chemical nature
- Structure type: Linear hexapeptide (6 amino acids)
- Modified form: N-acetylated + C-terminal amidated peptide
- Molecular weight: ~889 Da
- Solubility: Water-soluble
- Appearance (raw material): White to off-white powder
4. Amino acid sequence
Typical structure:
Ac–Glu–Glu–Met–Gln–Arg–Arg–NH₂
This sequence is designed to mimic part of SNAP-25, a key protein in neuronal signaling.
5. Core function in cosmetics
Its main purpose is to:
- Reduce the appearance of expression lines
- Target dynamic wrinkles caused by repeated facial movement
- Provide a “relaxation-like” cosmetic effect on skin appearance
6. Mechanism (brief overview)
It is believed to:
- Interact with the SNARE complex system
- Reduce efficiency of neurotransmitter release (mild, topical-level effect)
- Lead to reduced micro-muscle contraction appearance
7. Common uses
It is typically found in:
- Anti-wrinkle serums
- Eye creams (crow’s feet care)
- Forehead line treatments
- Firming and lifting skincare products
8. Stability and formulation
Stable in pH ~5–7
Sensitive to high heat and extreme pH
Best used in aqueous-based formulations (serums, gels)
Often combined with:
- Hyaluronic acid
- Other peptides
- Humectants and antioxidants
9. Skin penetration characteristics
- Highly hydrophilic
- Limited natural skin penetration
- Often requires formulation delivery systems (e.g., liposomes) for improved performance
10. Safety profile
- Generally well tolerated
- Low irritation risk
- Suitable for long-term cosmetic use
- No known systemic toxicity in topical applications
11. Key takeaway
- A lab-designed SNAP-25–mimicking peptide
- Used primarily for cosmetic wrinkle softening
- Effective mainly on early and expression-related lines
- Safe but mild in overall anti-aging strength
If you want, I can next provide a one-page comparison between Acetyl Hexapeptide-8, SNAP-8, and Matrixyl peptides so you can see how different anti-aging peptides differ in function and strength.