SNAP-8 (Acetyl Octapeptide-3): A Plain-English Research Guide
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What is SNAP-8?
SNAP-8, also known as acetyl octapeptide-3, is a synthetic eight-amino-acid peptide (Ac-Glu-Glu-Met-Gln-Arg-Arg-Ala-Asp-NHâ‚‚). It is an elongated version of the better-known hexapeptide Argireline (acetyl hexapeptide-3), with two extra amino acids added to the end.1
Both peptides copy a short stretch of SNAP-25, one of the proteins that lets nerve endings release their chemical messengers. By imitating that stretch, SNAP-8 is designed to interfere slightly with the release machinery. That’s why it’s studied in skin-aging research on expression lines, the wrinkles caused by repeated muscle movement.
SNAP-8 is an eight-amino-acid peptide that mimics part of the SNAP-25 protein and is studied in laboratory and cosmetic research on neurotransmitter release and expression lines. Full Scale Peptides supplies it as a freeze-dried powder with a published COA, for research use only.
SNAP-8 at a glance
Amino acids
Argireline's six amino acids plus two more, designed as a longer mimic of SNAP-25.
Target protein
A core part of the SNARE complex, the machinery nerve endings use to release messengers.
Mechanism
It competes with SNAP-25 rather than destroying it, unlike botulinum toxin.
Our current lot
HPLC purity for lot FSP-SNAP8-0326-A, with identity confirmed by LC-MS.
The SNARE complex, explained simply
When a nerve tells a muscle to contract, it releases a chemical messenger, acetylcholine, stored in tiny bubbles called vesicles. To release it, each vesicle has to fuse with the nerve ending's outer membrane. A set of proteins called the SNARE complex pulls the two membranes together like a zipper. SNAP-25 is one of the three core proteins in that zipper.
SNAP-8 imitates the N-terminal end of SNAP-25. When it slots into the complex in place of the real protein, the zipper forms less efficiently. Fewer vesicles fuse, less acetylcholine is released, and the contraction signal gets weaker without being blocked completely. In cell studies of the parent peptide Argireline, this approach reduced SNARE complex formation and messenger release in a dose-dependent way.1
How it differs from botulinum toxin
Botulinum toxin works on the same machinery but in a very different way: it cuts SNARE proteins, permanently disabling them until the nerve ending regrows the protein. SNAP-8 only competes with SNAP-25, so its effect is milder and reversible. That makes it a useful research tool for studying graded, partial changes in vesicle release and SNARE complex formation, without the toxicity of botulinum toxin.
SNAP-8 is widely used as a cosmetic ingredient. This page summarizes the research behind the peptide and does not describe any product or use in people or animals. SNAP-8 from Full Scale Peptides is sold strictly for laboratory research.
What scientists study SNAP-8 for
- Expression-line models. Measuring changes in wrinkle depth in skin models and cosmetic studies. The best-known controlled data are for the parent peptide Argireline, which reduced wrinkle measurements compared with placebo in a randomized study.3
- Neurotransmitter release. Cell-culture work on how SNARE mimics affect vesicle fusion and messenger release.1
- Topical delivery. Peptides this size struggle to cross the skin barrier, so SNAP-8 appears in studies of delivery methods such as dissolving microneedle patches.4
- Cosmetic peptide science. Comparisons across the broader class of “neurotransmitter-affecting” topical peptides.2
Much of the published efficacy data on SNAP-8 comes from ingredient manufacturers, and independent peer-reviewed studies are limited. Researchers generally treat Argireline data as the closest reference point and view SNAP-8-specific claims with caution.
SNAP-8 10mg, research grade
Freeze-dried powder with a third-party COA published before you buy, and tracked U.S. shipping. For laboratory research use only.
Purity and testing: why the COA matters
Short cosmetic peptides are made in huge volumes for skincare, and ingredient-grade material can vary widely in quality. Every SNAP-8 lot from Full Scale Peptides is tested by an independent lab, Freedom Diagnostics, before it is sold. HPLC measures purity, LC-MS confirms the molecular identity, and the full report is published before you buy.
- Lot
- FSP-SNAP8-0326-A
- Tested
- May 27, 2026
- Lab
- Freedom Diagnostics
- Measured content
- 11.25 mg (10 mg labeled)
- Accession #
- 2605260155
- Report
- View full COA
New to reading lab reports? See how to read and verify a Certificate of Analysis and why 99%+ purity matters in research.
How SNAP-8 is handled in the lab
SNAP-8 ships as a lyophilized (freeze-dried) powder, meaning the water has been removed to keep the peptide stable. Store sealed vials at −20 °C, protected from light. Before use in research it is reconstituted, or dissolved back into a liquid, usually with bacteriostatic water. Handling it the same careful way every time keeps results consistent:
- Let the sealed vial come to room temperature before opening it, to limit condensation.
- Add the water slowly down the inside wall of the vial, not directly onto the powder.
- Swirl gently until the powder is fully dissolved. Don’t shake it.
- Label the vial with the date, keep it refrigerated at 2–8 °C away from light, and avoid repeated freeze–thaw cycles.
For more detail, see our reconstitution guide and storage and handling best practices.
Key takeaways
- SNAP-8 (acetyl octapeptide-3) is an eight-amino-acid peptide, an elongated version of Argireline.
- It mimics part of SNAP-25 and competes with it in the SNARE complex, reducing messenger release from nerve endings.
- Its effect is competitive and reversible, unlike botulinum toxin, which permanently cuts SNARE proteins.
- It is studied in expression-line, neurotransmitter-release and topical-delivery research, though independent data are limited.
- Our current lot tests at 99.44% purity, with identity confirmed by LC-MS and the full COA published. For laboratory research use only.
Frequently asked questions
What is the difference between SNAP-8 and Argireline?
Argireline (acetyl hexapeptide-3) is six amino acids long. SNAP-8 (acetyl octapeptide-3) adds two more, making it a longer mimic of the same region of SNAP-25.
Is SNAP-8 the same as Botox?
No. Botulinum toxin permanently cuts SNARE proteins. SNAP-8 only competes with SNAP-25, so its effect in research models is milder and reversible.
Does SNAP-8 get through the skin?
Penetration is a known challenge for peptides of this size. That is why it appears in research on delivery methods such as microneedle patches.
What purity is Full Scale Peptides' SNAP-8?
The current lot (FSP-SNAP8-0326-A) measured 99.44% purity by HPLC, with identity confirmed by LC-MS at Freedom Diagnostics. The full Certificate of Analysis is published in our COA library.
How is SNAP-8 supplied and stored?
It ships as a 10 mg lyophilized powder in a sealed glass vial. Store unopened vials at −20 °C away from light. Once reconstituted, keep the vial refrigerated at 2–8 °C.
Is SNAP-8 for human or veterinary use?
No. The SNAP-8 we supply is sold strictly for laboratory research. It is not for human or veterinary use and must not be administered to people or animals.
Scientific references
The findings summarized on this page come from published scientific literature, available on PubMed. Full Scale Peptides did not conduct, fund or sponsor this research, and nothing here implies endorsement by the authors or their institutions. The studies describe research on SNAP-8 and related peptides itself, not the product we supply.
- Blanes-Mira C, Clemente J, Jodas G, et al. A synthetic hexapeptide (Argireline) with antiwrinkle activity. Int J Cosmet Sci. 2002;24(5):303–310. PMID: 18498523
- Gorouhi F, Maibach HI. Role of topical peptides in preventing or treating aged skin. Int J Cosmet Sci. 2009;31(5):327–345. PMID: 19570099
- Wang Y, Wang M, Xiao S, et al. The anti-wrinkle efficacy of argireline, a synthetic hexapeptide, in Chinese subjects: a randomized, placebo-controlled study. Am J Clin Dermatol. 2013;14(2):147–153. PMID: 23417317
- Avcil M, Akman G, Klokkers J, et al. Efficacy of bioactive peptides loaded on hyaluronic acid microneedle patches: a monocentric clinical study. J Cosmet Dermatol. 2020;19(2):328–337. PMID: 31134751
Continue your research
For laboratory research use only. Not for human or veterinary use. The information on this page is provided for educational purposes and describes published research; it is not medical advice, and no statement here has been evaluated by the FDA.