SNAP-8

In simple words

SNAP-8 is a longer, eight-amino-acid version of Argireline for cosmetics. It is studied as an ingredient that relaxes the facial expression muscles more strongly and reduces wrinkles at a lower concentration.

What this molecule is

Ac-Glu-Glu-Met-Gln-Arg-Arg-Ala-Asp-NH₂ — 8 aa (extended Argireline + Ala-Asp). A more complete mimicry of the N-terminal domain of SNAP-25.

Why it is studied

A second-generation muscle relaxant — an extended version of Argireline. According to the manufacturer: tighter binding → a more pronounced effect at lower concentrations. −38% wrinkles at 3% over 28 days. Microneedle patches (0.03%): improved transdermal delivery.

How it works

Competitively inhibits assembly of the SNARE complex (SNAP-25+Syntaxin+VAMP) → ↓ACh exocytosis. 8 aa = tighter binding to the target vs the 6 aa of Argireline. Result: a more pronounced ↓contraction of facial expression muscles.

Doses used in studies

Studies used 3–5% in a serum twice a day. Microneedle patches 0.03% — 24 volunteers, 28 days. Clinical result: −38% at 3% over 28 days.

Combined with in studies

• Leuphasyl — SNARE + Ca²⁺ channels — different targets
• Matrixyl — muscle relaxation + collagen synthesis
• Argireline — NOT on the same area — competition for SNAP-25

Level of evidence

Level B Human observational data. There are studies in humans, but they are small, uncontrolled, or cohort studies. The data are encouraging but need confirmation. Clinical studies in formulations. Standalone placebo-controlled RCTs are limited.

Important to know

⚠️ Cosmetic ingredient (Lipotec/Lubrizol). Fewer standalone RCTs than for Argireline.

Studies in PubMed

1. Clinical Safety and Efficacy Evaluation of a Dissolving Microneedle Patch Having Dual Anti-Wrinkle Effects With Safe and Long-Term Activities. (Ann Dermatol, 2024)
2. Efficacy of bioactive peptides loaded on hyaluronic acid microneedle patches: A monocentric clinical study. (J Cosmet Dermatol, 2020)
3. Cosmeceutical Peptides in the Framework of Sustainable Wellness Economy. (Front Chem, 2020)
4. Enhanced Skin Permeation of Anti-wrinkle Peptides via Molecular Modification. (Sci Rep, 2018)
5. Peptides: Emerging Candidates for the Prevention and Treatment of Skin Senescence: A Review. (Biomolecules, 2025)
6. Peptide-pro complex serum: Investigating effects on aged skin. (J Cosmet Dermatol, 2023)