Science
Mechanism of Action
As Acetyl Octapeptide-3 (SNAP-8), this ingredient functions by mimicking the N-terminal segment of the SNAP-25 protein, a critical component of the SNARE complex. It competitively interferes with the formation and stability of this complex, which is essential for the release of neurotransmitters. By reducing the signaling of neurotransmitters such as acetylcholine, it lessens facial muscle contractions, leading to a visible relaxation of expression lines while preserving natural facial movement.
Research
Clinical Evidence
Medium confidence1%
Key findings
- 01 Reduced wrinkle depth by up to 34.98% over 28 days with consistent twice-daily application.
- 02 Achieved a dramatic reduction in the appearance of expression lines and wrinkles by up to 63% over 30 days with regular twice-daily use.
- 03 Demonstrated excellent tolerability over a 12-week period.
Transparency
Dusting Analysis
While clinical studies indicate effective concentrations for Octapeptide-3 range from 3% to 10% (with a 10% concentration showing significant wrinkle reduction), it's important to note that concentrations within this effective range are often higher than what is typically present in commercial skincare products. Formulators are generally advised to add Octapeptide-3 at 1-5% into product solutions. Consumers should scrutinize product concentration claims, as formulations below 3% may offer diminished efficacy, indicating potential 'dusting'.
The Formula
Formulation
Stability
Octapeptide-3 is water-soluble and stable within a pH range of 5.0 to 7.0. For optimal stability, it should be incorporated into water-based emulsions, serums, or gels during the cool-down phase of formulation, specifically when temperatures are below 40°C. The pure peptide is hygroscopic and requires protection from light, stored at -20°C, while prepared cosmetic solutions should be stored at 10°-25°C.
Safety
Safety Profile
Acetyl Octapeptide-3 is broadly considered safe for topical use in cosmetic products. Safety assessments indicate low risks across categories such as cancer, allergies, immunotoxicity, and developmental/reproductive toxicity. It is recognized by the FDA with a UNII number and has shown a favorable safety profile according to SkinSAFE, with excellent tolerability observed in clinical studies.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Octapeptide-3 is a valuable peptide recognized for its targeted ability to visibly relax facial muscle contractions, thereby diminishing expression lines and contributing to a smoother skin appearance, all while maintaining a good safety profile.
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