What it is
SNAP-8 is the trade name for acetyl octapeptide-3, a cosmetic peptide made by Lipotec, the Barcelona company behind argireline. It is argireline with two more amino acids added to the chain, turning a six-residue peptide into an eight-residue one. Both are copies of a short stretch of SNAP-25, a protein that nerve endings use to release acetylcholine.
It is sold as a topical ingredient in anti-wrinkle serums and eye creams and, more recently, in dissolving microneedle patches. Research-peptide sellers also sell it as lyophilised powder in vials.
How it works
The idea is the same as argireline's. Muscle contraction starts when a nerve ending releases acetylcholine, and that release depends on a group of proteins called the SNARE complex. SNAP-25 is part of that complex.
A peptide that looks like a piece of SNAP-25 can compete with the real protein and make the complex less efficient. Botulinum toxin A works on the same target by cutting SNAP-25 outright, which paralyses the muscle. SNAP-8 is meant to "capture" SNAP-25 rather than cut it, so the effect, if any, is a slight relaxation rather than paralysis. The extra two amino acids were added with the aim of a better fit.
As with argireline, the practical problem is getting a water-soluble peptide through the skin to the small muscles under expression lines. Work on argireline has found only a tiny fraction of a topical dose gets past the outermost skin layer, and there is no reason to assume SNAP-8, a slightly larger molecule, does better.
What the research found
Human studies. We could not find a peer-reviewed, placebo-controlled human trial of SNAP-8 on its own. The efficacy figures that circulate online, including the "up to" percentages on product pages, trace back to manufacturer marketing material rather than published trials. For that reason this page does not repeat them.
Laboratory and analytical work. The published peer-reviewed literature on SNAP-8 is mostly analytical. Ji and colleagues (2020) developed the first validated method for measuring acetyl octapeptide-3 by liquid chromatography and mass spectrometry and applied it to microneedle patches, a sign that it is now being built into more advanced delivery formats. Their introduction repeats the manufacturer position that SNAP-8 is more effective than argireline, but the paper did not test that.
Closest evidence by analogy. Argireline, the parent peptide, has small human trials: a 10-woman study in 2002 and a 60-person placebo-controlled trial in 2013, and a 2025 review of ten human studies found consistent but modest wrinkle reductions. Whether SNAP-8 matches or beats that is an open question.
Side effects reported in studies
No human safety data specific to SNAP-8 has been published that we could find. The parent peptide argireline showed no significant adverse effects across the ten trials in the 2025 review. For a topical cosmetic, local redness, stinging or dryness are the realistic risks, more likely when layered with retinoids or exfoliating acids.
SNAP-8 vs argireline
| SNAP-8 | Argireline | |
|---|---|---|
| INCI name | Acetyl octapeptide-3 | Acetyl hexapeptide-8 |
| Length | 8 amino acids | 6 amino acids |
| Target | SNAP-25 / SNARE complex | SNAP-25 / SNARE complex |
| Peer-reviewed human trials | None found | Small trials, including one placebo-controlled RCT |
| Main use | Topical cosmetic | Topical cosmetic |
For skin quality and collagen rather than expression lines, GHK-Cu (topical) works through a different mechanism and has more published human work. See best peptides for skin for how these compare.
Status in the Philippines
SNAP-8 is a cosmetic ingredient. Finished skincare products containing it are regulated as cosmetics by FDA Philippines. It has no approved medical use. Vials sold by research-peptide suppliers are not cosmetics and are not registered products; there is no studied use for injecting it.
Storage
Keep finished products closed, away from direct sunlight and heat. Heat speeds up the breakdown of water-based peptide serums, and a Manila room without aircon regularly passes 30°C. Lyophilised powder is best kept refrigerated.
