Science
Mechanism of Action
This ingredient operates as a neuropeptide, structurally mimicking the N-terminal fragment of SNAP-25, a protein critical for the formation of the SNARE complex. By competitively binding with SNAP-25, OLIGOPEPTIDE-141 HEXAPEPTIDE-8 destabilizes the SNARE complex, thereby inhibiting the precise release of neurotransmitters, particularly acetylcholine, at neuromuscular junctions. This targeted inhibition effectively diminishes facial muscle contractions, leading to a reduction in the depth and visibility of expression wrinkles and impeding the formation of new ones. Furthermore, it actively promotes the synthesis of collagen fibers, contributing to improved skin flexibility, texture, and firmness, and boosts skin hydration by increasing endogenous hyaluronic acid production. Preliminary research also suggests a potential sebosuppressive effect linked to its influence on acetylcholine release within sebaceous glands.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 Achieved a 30% reduction in wrinkle depth over 30 days in vivo when formulated within a face cream.
- 02 Decreased wrinkle depth around the eyes by 17% after 15 days of consistent topical application in in-vivo tests.
- 03 Resulted in a 16.26% reduction in overall wrinkle depth after 28 days of application during in-vivo testing.
- 04 Demonstrated increased skin moisturization and significant reductions in both wrinkle depth and width in research conducted by a Spanish University.
Transparency
Dusting Analysis
Clinical studies showcasing significant wrinkle reduction (e.g., 30% at 10%, 17% at 10%, 16.26% at 5%) employ concentrations substantially exceeding the maximum concentration of 0.005% deemed safe for leave-on formulations by the Cosmetic Ingredient Review (CIR) Expert Panel. The CIR explicitly noted insufficient data for evaluating safety at concentrations above 0.005%, specifically lacking a no-observed-adverse-effect-level (NOAEL) for type I and type III collagen synthesis. This pronounced disparity indicates that achieving the clinically demonstrated benefits would require using concentrations far beyond current safety recommendations, potentially leading to 'dusting' at sub-efficacious but CIR-compliant levels.
The Formula
Formulation
Stability
OLIGOPEPTIDE-141 HEXAPEPTIDE-8 is highly water-soluble and hydrophilic. It maintains optimal stability within a neutral pH range and under refrigerated conditions. However, its efficacy and integrity are susceptible to degradation in highly acidic or basic environments, as well as at elevated temperatures.
Conflicts
- Strong oxidation ingredients
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Acetyl Hexapeptide-8 is safe for use in cosmetic formulations, subject to specific concentration restrictions. For leave-on products (e.g., eye lotions, face and neck creams), the maximum safe concentration is 0.005%, while for rinse-off products, it is 0.000005%. This restriction is due to insufficient data for evaluating safety at higher concentrations, particularly concerning potential effects on type I and type III collagen synthesis. It is generally considered non-toxic and well-tolerated by the skin, though it is not an FDA-approved drug.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While OLIGOPEPTIDE-141 HEXAPEPTIDE-8 demonstrates compelling clinical efficacy in reducing wrinkles and boosting hydration, its effective concentrations (5-10%) substantially exceed the maximum concentration (0.005%) for which the CIR Expert Panel has deemed it safe due to data limitations, raising concerns about its practical utility at compliant doses.
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