SNAP-8 (Acetyl Octapeptide-3)_Dosage, benefits & legal status
Also known as acetyl octapeptide-3, SNAP-8
A stronger topical wrinkle-smoothing peptide for forehead and eye lines.
Common vial size is what vendors typically sell, not a recommendation. Enter your own vial in the calculator.
What is SNAP-8 (Acetyl Octapeptide-3)?
Plain language first. The technical label stays, but it never stands alone.Overview
Put on the skin, it relaxes the tiny muscles under expression lines. That softens forehead and eye wrinkles.
SNAP-8 (acetyl octapeptide-3) is a longer cousin of Argireline used in skincare.
What it's used for
A stronger cousin of Argireline in skincare, used to soften forehead and eye wrinkles.
How does SNAP-8 (Acetyl Octapeptide-3) work?
What it does in the body, and where.SNAP-8 is Argireline extended by two amino acids, on the theory that a longer fragment binds its target better.
- 01Same SNARE mechanism as ArgirelineInterfering with the release of the muscle-contraction signal.
- 02The longer chain is claimed to work betterA manufacturer claim. There is no independent head-to-head study establishing it.
- 03The same penetration problem appliesAnd it is worse for a larger molecule, since size is the main barrier to crossing skin.
Where this compound is thought to act.
What else is it used for?
Each use below carries its own evidence level. Approved means regulators have cleared it for that purpose. Investigational means it is in trials. Early research means it is being studied and is not established.
- Softening forehead and eye wrinkles, applied to the skinOTC / supplement
The published record
2
Records indexed for SNAP-8 (Acetyl Octapeptide-3)
1 in humans, 1 of them original studies.
Counted from Europe PMC indexing, not read by a person. Human means indexed under humans, which includes reviews and work on human cells. Original studies exclude reviews and lab work on human cells.Last updated 12 September 2026.
At a glance
Four things to know about SNAP-8 (Acetyl Octapeptide-3)
Evidence
OTC / supplement
Category
Skin and cosmetic
Common vial
Varies
Half-life
Not measured, and not the right question
How much, and do you cycle it?
The range, and whether you take breaks.Serum, per product, daily. Not cycledCommunity practice
Used daily as part of a routine. The effect depends on continued use and returns to baseline when you stop, so there is nothing to cycle off.
How long does it stay in the body?
The half-life, and where the figure comes from.Not measured, and not the right questionNo figure
This is a topical cosmetic ingredient. A blood half-life measures how fast something leaves the bloodstream, and these are not intended to reach it in meaningful amounts. What matters for a topical is how much penetrates the skin and how long it stays in the tissue, which is a different measurement and one that is rarely published.
You can compare this against the whole library to see where it sits.
What does it cost?
Typical dose and cost, in plain numbers.SNAP-8 (Acetyl Octapeptide-3) is not injected
It is taken on the skin (topical). Applied as a topical product at the concentration the manufacturer sets. There is no injected dose.
SNAP-8 (Acetyl Octapeptide-3) starts at $22.11 across 23 vendors, typically $0.86 – $4.90 per mg.
29 listings, last read Sep 6, 2026. Shipping and card fees are not included.
How do you store it?
Before mixing, and after.Room temperature, out of light. Cap it tight after each use.
SNAP-8 (Acetyl Octapeptide-3) ships as a cream, gel, or serum. Keep it at room temperature away from sun and heat unless the label says otherwise. Refrigerating an emulsion can split the texture. Watch for color, smell, or separation changes and stop using it if any appear.
What are the side effects and cautions?
Known cautions and warnings for this compound.Who should avoid it
- A known allergy to the ingredient
- Broken skin
Stop and get help
- A rash, swelling, or intense itching where applied
Common effects
- Generally well tolerated on the skin
- Occasional mild irritation
- Safety data is limited to cosmetic topical use
Where this page says nothing is established, that means nobody has studied it, not that a compound is safe.
Is SNAP-8 (Acetyl Octapeptide-3) approved?
And where the numbers on this page come from.Not as a medicine. SNAP-8 (Acetyl Octapeptide-3) is sold without a prescription as a supplement or cosmetic ingredient, which is a different thing from being approved as a drug.
- Approval statusOTC / supplement
- RouteOn the skin (topical)
- CheckedJuly 2026
What has happened recently
We have not yet written a full regulatory note for this compound. The status above is current as of the date shown.
You can compare this against the whole library, or read how to check a seller.
- DoseFrom product labeling and published use.
- Vial sizeFrom what vendors typically list; not a recommendation.
- Sources
- Reviewed22 July 2026
What else is like SNAP-8 (Acetyl Octapeptide-3)?
Others in Skin and cosmetic, side by side.If you're weighing SNAP-8 (Acetyl Octapeptide-3), it's worth reading Matrixyl (Palmitoyl Pentapeptide-4), Palmitoyl Tripeptide-1, and Tetrapeptide-21 in the same class.
A stronger topical wrinkle-smoothing peptide for forehead and eye lines.
- Dose
- Serum, per product
- How often
- Daily
A topical collagen-boosting peptide that firms skin over time.
- Dose
- Serum, per product
- How often
- Daily
A topical collagen peptide that firms and smooths skin.
- Dose
- Serum, per product
- How often
- Daily
A topical peptide for firmer, plumper skin.
- Dose
- Serum, per product
- How often
- Daily
Guides for this compound
- How to Reconstitute a Peptide
Mix peptide powder with bacteriostatic water, step by step.
- mcg vs mg: The Peptide Dosing Mistake to Avoid
Your vial says mg and your protocol says mcg. Here is the conversion and how to check it.
- How to Read a Peptide COA
What the purity number does and does not tell you, and how to spot an edited report.
- How to Vet a Peptide Vendor
Independent COAs, HPLC purity, and the red flags that mean walk away.
Sources
- Ferreira et al., Trending Anti-Aging Peptides (Cosmetics 7:91)(2020)SNAP-8 is Acetyl Octapeptide-3, and the review describes it as an elongation of Acetyl Hexapeptide-8 working the same way, by interfering with the SNARE complex to reduce acetylcholine release and so muscle contraction. The evidence entry for it is a randomized controlled study, but marked as supplier information rather than independent published work, which is the distinction that matters when comparing it to its better-studied relative. Worth knowing how this review grades evidence: it marks study types that came from the ingredient supplier rather than independent published work, and almost every peptide in its table carries that mark. The authors state that most clinical studies in this field are run by suppliers to generate marketing claims, are not published in peer-reviewed journals, and do not disclose their methods.
Last reviewed 22 July 2026
Beyond these, 2 records are indexed. Browse the records