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Limited Research

Snap-8 (Acetyl Octapeptide-3)

Skin, Hair & Beauty · ['Acetyl Octapeptide-3', 'Acetyl Octapeptide-1', 'SNAP-8', 'Acetyl glutamyl heptapeptide-3']

A synthetic acetylated octapeptide used as a cosmetic ingredient, structurally based on the N-terminal region of SNAP-25 and studied for its proposed interference with SNARE-complex-mediated neurotransmitter release — a mechanism explored in the context of expression-line cosmetics.

🔬 Research use only — not for human or veterinary use. K4 Elite does not provide dosing instructions.
Molecular Formula
C42H72N16O15S
Molecular Weight
1073.2 g/mol
PubChem
CID 71587832 ↗
Research Level
Limited Research
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Snap-8 (Acetyl Octapeptide-3) chemical structure

Snap-8, with the INCI name acetyl octapeptide-3, is a synthetic, acetylated eight-amino-acid peptide developed as a topical cosmetic ingredient. Its sequence is derived from the N-terminal domain of SNAP-25, a protein in the SNARE complex that participates in vesicle fusion and neurotransmitter release. It is an elongation of the shorter Argireline (acetyl hexapeptide-8) concept.

PubChem indexes acetyl octapeptide-3 under CID 71587832, with molecular formula C42H72N16O15S and a molecular weight of approximately 1073.2 g/mol. It is studied and marketed within the cosmetic "skin, hair and beauty" space, principally in the context of the appearance of expression lines. Peer-reviewed clinical literature specific to Snap-8 is limited, and much of the available information derives from ingredient and cosmetic-science sources.

This entry is for laboratory and educational reference only. It describes the proposed mechanism and available research context and is not a description of a product's efficacy or a recommendation for human or veterinary use.

Snap-8 is proposed, in cosmetic-science literature, to mimic a segment of SNAP-25 and thereby compete with native SNAP-25 for a position in the SNARE complex that drives synaptic-vesicle docking and fusion. By interfering with SNARE-complex assembly, the peptide is theorized to modestly attenuate catecholamine and acetylcholine release at the neuromuscular interface, reducing the muscle contractions associated with expression lines.

This mechanism is analogous in concept to how botulinum neurotoxin disrupts SNARE proteins, though the proposed peptide effect is far weaker and its relevance after topical application is a subject of debate given peptide skin-permeation constraints. The mechanism is largely inferential and based on the SNAP-25 sequence relationship rather than on extensive controlled human data.

  • SNARE-complex biology — the SNAP-25 mechanism underlying the peptide's design is well characterized in neuroscience literature (Sudhof & Rothman, 2009).
  • Cosmetic peptide science — acetyl octapeptide-3 has been discussed in reviews of anti-wrinkle cosmetic peptides (Gorouhi & Maibach, 2009).
  • Expression-line appearance — the ingredient is studied in the context of the visible appearance of dynamic wrinkles.
  • Peptide skin permeation — research on topical peptide delivery informs debate about the ingredient's activity.
  • Neuromuscular signaling models — the SNARE-interference concept links to studies of neurotransmitter release.
📋 How published studies were conducted — a research reference summarizing study designs from the literature. This is not usage, dosing, or administration guidance. K4 Elite does not provide dosing instructions; determining any research protocol is the sole responsibility of the qualified researcher.

Published, independent clinical trials specific to Snap-8 are limited, and much of the circulating efficacy information originates from manufacturer-associated cosmetic testing rather than peer-reviewed randomized studies. Gorouhi & Maibach (2009) reviewed the broader class of neurotransmitter-inhibiting cosmetic peptides (including acetyl hexapeptide and related octapeptides), summarizing the proposed SNARE-based rationale and noting the limited independent clinical evidence for topical efficacy.

The foundational SNARE-complex work summarized by Sudhof & Rothman (2009) describes the molecular machinery the peptide is designed to mimic, in laboratory and cell systems. These descriptions report what the science establishes and are not recommendations or claims of cosmetic effect.

Combinations examined in the research literature. Descriptive only — not a recommendation to combine compounds.

Argireline (Acetyl Hexapeptide-8)Compatible
A shorter peptide based on the same SNAP-25 rationale; the two are often discussed and formulated together in cosmetic research.
Matrixyl (Palmitoyl Pentapeptide-4)Compatible
A collagen-stimulation-oriented cosmetic peptide often combined with SNARE-targeting peptides in formulation studies.
Botulinum toxinNeutral
Shares a conceptual SNARE-disruption target but is a pharmacologically distinct injectable agent, not comparable in potency.
Hyaluronic acidCompatible
A common co-formulated humectant in cosmetic vehicles; no specific peptide interaction reported.
  1. PubChem CID 71587832 (Acetyl octapeptide-3)
  2. Gorouhi & Maibach, Role of topical peptides in skin care (2009), Int J Cosmet Sci
  3. Sudhof & Rothman, Membrane fusion and SNARE machinery (2009), Science
  4. Blanes-Mira et al., Acetyl hexapeptide (SNARE) reduces wrinkles (2002), Int J Cosmet Sci
What is Snap-8?
It is acetyl octapeptide-3, a synthetic eight-amino-acid cosmetic peptide derived from the SNAP-25 sequence. PubChem CID 71587832, formula C42H72N16O15S, molecular weight about 1073.2 g/mol.
How is it proposed to work?
Cosmetic-science literature theorizes that it competes with SNAP-25 in the SNARE complex, modestly reducing neurotransmitter release associated with expression-line muscle contractions.
Is there strong clinical evidence for Snap-8?
Independent peer-reviewed clinical data specific to Snap-8 are limited; much information comes from ingredient and manufacturer sources. Its status here is Limited Research.
How does it relate to Argireline?
Snap-8 is an eight-amino-acid extension of the same SNAP-25-based concept behind Argireline (acetyl hexapeptide-8).
Can this be used as a cosmetic or drug?
No. This entry is for research and educational reference only. It does not describe a product's efficacy and is not a recommendation for human or veterinary use.
Disclaimer: This profile summarizes published preclinical and laboratory research for reference only. It is not medical advice and makes no claim of safety or efficacy in humans. Determining any research protocol is the sole responsibility of the qualified researcher. Products are sold strictly for in-vitro research and have not been evaluated by the FDA.