Peptides›Cosmetic›Acetyl Hexapeptide-8

Acetyl Hexapeptide-8

/ Synthetic N-acetylated hexapeptide; INCI 'Acetyl Hexapeptide-8'; SNAP-25 mimic / SNARE-targeting cosmetic peptide

SPECULATIVEN = 0 · TESTING PENDINGMW 888.05 g·mol⁻¹

ALIAS · Argireline (trade — Lipotec) · Acetyl Hexapeptide-3 · Acetyl Hexapeptide-8 (INCI)

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Research use onlyAny dose figures below describe what specific cited studies used, reported factually. Nothing on this page is guidance for human use.READ FIRST →

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§ A · Identity

Primary sequenceAc-EEMQRR-NH2

MW · 888.05CLASS · Synthetic N-acetylated hexapeptide; INCI 'Acetyl Hexapeptide-8'; SNAP-25 mimic / SNARE-targeting cosmetic peptideCATEGORY · Cosmetic

Tier 4 cosmeceutical. Best-studied of the INCI catalog cosmetic peptides, with multiple peer-reviewed topical efficacy and in-vitro mechanism papers — though the central efficacy publications are authored by the originating supplier (Lipotec / Lubrizol). Independent Western replication is limited.

§ B · Mechanism of action

Acetyl Hexapeptide-8 is an N-acetylated, C-amidated hexapeptide whose sequence corresponds to the N-terminal portion of SNAP-25, a component of the SNARE complex that mediates synaptic vesicle fusion at the neuromuscular junction. The proposed cosmetic mechanism is competitive interference with SNARE complex assembly in dermal/cutaneous nerve endings, attenuating acetylcholine release and reducing the muscle-contraction component of expression-line formation. Topical penetration to the depth required to reach motor nerve terminals is constrained by stratum corneum permeability — the in-vivo mechanism in human skin is not as cleanly established as the cell-free SNARE-disruption work.

§ C · Human clinical evidence

Tier 4. Original characterisation (Blanes-Mira 2002, Int J Cosmet Sci) demonstrated SNARE complex interference in cell-free and neurosecretion assays. Topical efficacy in subject panels (Wang 2013, J Cosmet Laser Ther) reported reductions in periorbital wrinkle scoring. Both pivotal references are authored by industry-aligned groups; independent placebo-controlled Western replication outside the supplier ecosystem is sparse.

§ D · Primary literature

PubMed18498523Blanes-Mira C et al. — A synthetic hexapeptide (Argireline) with antiwrinkle activity · International Journal of Cosmetic Science · in-vitroCell-free SNARE assembly assays demonstrated competitive disruption by the Ac-EEMQRR-NH2 hexapeptide; topical preliminary report indicated wrinkle-depth reduction in a small subject panel.Limitations: Industry authorship (Lipotec-affiliated); topical clinical component small and uncontrolled by modern standards.2002

PubMed23607739Wang Y et al. — The anti-wrinkle efficacy of synthetic hexapeptide (Argireline) in Chinese subjects · Journal of Cosmetic and Laser Therapy · human-observationalTopical argireline-containing formulation over 4 weeks was associated with reductions in periorbital wrinkle scoring in a Chinese subject panel.Limitations: Industry-aligned authorship; small panel; proprietary skin-imaging endpoints; not a contemporary regulatory-grade RCT.2013

§ F · Safety signal

Topical use across cosmetic formulations is reported as well tolerated in industry-published trials and dermatologic adverse-event surveillance. No systemic exposure has been characterised — the molecule is not absorbed at meaningful concentrations through intact skin. Botulinum-toxin-comparison framing is marketing language, not a pharmacological equivalence.

§ H · Regulatory status

Regulatory status

FDA status:: Not FDA-approved

§ I · Notable gaps and controversies

Industry-authored efficacy literature is the primary methodological caveat. The 'topical Botox' positioning conflates SNARE-mechanism plausibility with in-vivo clinical equivalence, which the published topical data do not support. Stratum-corneum penetration of a charged hexapeptide is intrinsically limited; formulation (liposomes, penetration enhancers) drives any meaningful effect.