SNAP-8
Acetyl octapeptide-3
SNAP-8 is acetyl octapeptide-3, a cosmetic peptide marketed as a topical alternative to botulinum toxin for expression lines.
Regulatory status: A cosmetic ingredient. Not a medicine, not approved as one, and not comparable to an injected neurotoxin.
Default vial
10 mg
Default mix
5 mL
Reported range
Topical cosmetic use
Draw (U-100)
50 u
A cosmetic ingredient applied to the skin, marketed as a topical alternative to botulinum toxin. It is formulated into creams, not injected, and the supporting data is largely manufacturer-generated.
Where these numbers come from
No published study reports a dose for this compound in people. The figures here exist only so the calculator can run — they are not a recommendation. SNAP-8 is a topical cosmetic ingredient, formulated into creams rather than injected, and the supporting data is largely manufacturer-generated.
Reviewed October 2026
What it is
- An eight-amino-acid peptide, an extension of the earlier hexapeptide argireline.
- Formulated into creams and serums; it is applied to the skin, not injected.
- Marketed on the premise that it interferes with the SNARE complex that vesicles use to release acetylcholine.
- The comparison to botulinum toxin is a marketing analogy, not an equivalence — the toxin is an enzyme injected into muscle, this is a peptide in a cream.
How it is described to act
- 1
Applied topically in a cosmetic formulation.
- 2
A peptide of this size crossing the stratum corneum in meaningful quantity is the central difficulty, and it is formulation-dependent.
- 3
The proposed mechanism is reduced neurotransmitter release at the neuromuscular junction, lessening the muscle contraction that creates expression lines.
- 4
Reported outcomes are appearance measures over weeks of twice-daily use.
What the research has looked at
The evidence base
- The supporting data for SNAP-8 is largely generated by the ingredient manufacturer rather than independent researchers, which is normal for cosmetic actives and worth knowing.
- Pep-Tidy has not identified independent randomised clinical trials of this peptide.
- The related peptide argireline has somewhat more published work, but it is a different, shorter sequence.
Strength of evidence: Preclinical evidence only
The available data is mostly manufacturer-generated appearance testing. No independent clinical trial has been identified.
What is published comes from cell and animal studies. Findings in those models frequently do not carry over to people.
Reported cautions and unknowns
- As a topical cosmetic ingredient it has a reassuring general record, with irritation and sensitivity the main concerns.
- There is no basis for injecting it — it is formulated for the skin surface and has not been studied any other way.
References
There are none. A search of the published literature returns no studies of this compound — no human trials, no animal work, no cell studies. Anything claimed about it elsewhere is not drawn from published research on this molecule.
Handling this vial
- Lyophilized vials are generally stored at 2–8 °C and kept out of light; once reconstituted with bacteriostatic water they are refrigerated and commonly discarded after 28 days.
- Mix by aiming water down the vial wall and rolling gently — do not shake — and never re-freeze a reconstituted vial.
- Pep-Tidy cannot verify what is in your vial. Ask your supplier for a current Certificate of Analysis (HPLC/MS).
SNAP-8 questions people ask
How do you reconstitute SNAP-8?
A common starting point for a 10 mg vial of SNAP-8 is 5 mL of bacteriostatic water, which gives 2 mg per mL. Aim the water down the inside wall of the vial, let it dissolve on its own, and roll gently instead of shaking. Pep-Tidy's reconstitution calculator will recalculate the numbers for any other vial size or water volume you use.
How many units of SNAP-8 is one dose?
At 2 mg per mL, that works out to about 50 units on a U-100 insulin syringe for a 1000 mcg dose. Change the vial size, water volume, or target dose in the calculator and the syringe reading updates with it. This is arithmetic, not a dosing recommendation.
What dosing schedule is reported for SNAP-8?
Published and community sources describe Topical cosmetic use, topical, every day, typically run 12 weeks on. These figures describe what has been reported, not what anyone should take — talk to a licensed clinician first.
How should SNAP-8 be stored?
Lyophilized SNAP-8 vials are generally kept at 2–8 °C and out of light. Once reconstituted with bacteriostatic water they are refrigerated and commonly discarded after about 28 days. Never re-freeze a reconstituted vial and never shake it.
Read this before you act on anything above
Everything on this page is a summary of what other people have published — it is not medical advice, not a recommendation, and not a dosing instruction. Reported dose ranges describe what appears in the literature or in community protocols, not what anyone should take. Talk to a licensed clinician before using any peptide.