SNAP-8 (Acetyl Octapeptide-3)
SNAP-8 is a synthetic, lab-made eight-amino-acid peptide used as a cosmetic ("cosmeceutical") active in topical anti-aging products. Its INCI name is Acetyl Octapeptide-3, and it is typically supplied dissolved in water with caprylyl glycol (INCI: Water, Acetyl Octapeptide-3, Caprylyl Glycol). The sequence mimics part of the natural protein SNAP-25; chemically it is an acetylated octapeptide (Ac-EEMQRRAD-NH2) of roughly 1075 Da molecular weight. It is an extended relative of Argireline (Acetyl Hexapeptide-8), with two additional amino acids, and is marketed as being modestly more active than its parent peptide. It is used in leave-on creams and serums, not injected.
Education only. This page summarises published research on a cosmetic or dietary ingredient. It is not medical advice and makes no treatment claims; for a finished product, follow its label.
- Also known as
- Acetyl Octapeptide-3, SNAP-8, Acetyl Glutamyl Octapeptide, SNAP-8 peptide, Ac-EEMQRRAD-NH2
- Class
- Topical neurotransmitter-inhibiting cosmetic peptide (SNAP-25 mimetic / SNARE-complex modulator); an octapeptide extension of the hexapeptide Argireline
How does SNAP-8 work?
In facial muscles, nerve endings release the neurotransmitter acetylcholine to trigger contraction; that release depends on a protein assembly called the SNARE complex, in which SNAP-25 plays a key role. SNAP-8 mimics the N-terminal segment of SNAP-25 and is intended to compete for a position in the SNARE complex, destabilizing its assembly and thereby reducing acetylcholine release. The idea is to gently relax the small muscles that produce dynamic "expression" wrinkles. This is conceptually similar to how botulinum toxin works but is far weaker, non-paralytic, and applied to the skin surface rather than injected. A major practical caveat is that large, water-loving peptides like this penetrate intact skin poorly, so how much actually reaches the neuromuscular junction from a topical product is uncertain.
What has SNAP-8 been studied for?
- Appearance of dynamic expression wrinkles (forehead lines, crow's feet / lines around the eyes)
- Softening the look of fine lines as a topical 'Botox-alternative' cosmetic active
- Cosmetic skin-smoothing / anti-aging serums and creams
What does the evidence show?
Evidence is limited and largely manufacturer-derived rather than from independent, peer-reviewed, double-blind clinical trials. The most-cited supplier study reports that a 10% SNAP-8 solution applied twice daily for 28 days in 17 women reduced wrinkle appearance by about 34.98%, versus about 27.05% for Argireline at the same concentration; a separate manufacturer claim states wrinkle severity around the eyes decreased "up to 63%." These figures come from the ingredient maker's own testing and small samples, not from rigorous independent trials, and partly rest on in-vitro work. Independent reviews note that even Argireline (the better-studied parent peptide) has inconsistent clinical significance, and that less than ~0.2% of such peptides may penetrate the stratum corneum in absorption studies — a significant limitation for any topical mechanism that requires reaching muscle nerves. Bottom line: plausible mechanism and some positive but low-quality, conflict-of-interest-prone data; results are typically modest and gradual, far short of injectable neuromodulators, with no rigorous long-term efficacy data and no guaranteed outcome.
What is known about the safety of SNAP-8?
Generally regarded as well tolerated in topical cosmetic use at typical formulation levels (commonly ~3-10% of the supplied solution, which is itself a dilute peptide preparation). Reported reactions are uncommon and mild — possible local irritation, redness, stinging, or contact sensitivity, as with many leave-on actives. There is no established systemic toxicity profile for topical use, and given poor skin penetration, systemic exposure from cosmetic application is expected to be minimal. Long-term safety data specific to SNAP-8 are limited. As with any new skincare active, patch testing is sensible; avoid use on broken or irritated skin and around the eyes if irritation occurs. Not intended for ingestion or injection. People who are pregnant, breastfeeding, or have sensitive/reactive skin should consult a clinician before use.
What is the legal status of SNAP-8?
Legal as a cosmetic ingredient. SNAP-8 / Acetyl Octapeptide-3 is regulated as a cosmetic active (cosmeceutical), not a drug. It is permitted in topical cosmetic formulations in the US (sold over-the-counter as a cosmetic, not FDA-approved as a pharmaceutical and not making approved drug claims), in the EU (listed in the CosIng cosmetic ingredient database), and in most international markets under standard cosmetic ingredient rules. It is not a controlled substance and is not a WADA-banned substance for topical cosmetic use. Note that injectable "research" vials of SNAP-8 sold by some vendors are not approved for human injection and fall outside legitimate cosmetic use.
What is the half-life of SNAP-8?
Not characterized as a systemic pharmacokinetic half-life, because SNAP-8 is used topically with minimal absorption rather than dosed into the bloodstream. As a small peptide it would be expected to be broken down rapidly by peptidases if it entered circulation, but no validated human half-life is established for cosmetic use. Practical "duration" relates to ongoing topical application and product formulation/stability (peptide solutions are typically kept refrigerated and formulated below ~40°C to preserve activity) rather than to a measured biological half-life.
Where to find SNAP-8 at Peppies
Sources
- Wikipedia — Acetyl hexapeptide-8 (Argireline), covering SNAP-25/SNARE mechanism, topical penetration limits (<0.2% across stratum corneum), and OTC cosmetic status of the peptide family
- INCIDecoder — Acetyl Octapeptide-3 (SNAP-8)
- Journal of Analytical Science and Technology (Springer) — Method development for acetyl octapeptide-3 analysis by LC-MS/MS (2020)
- Lotioncrafter — SNAP-8 peptide solution technical/INCI data
- COSSMA — SNAP-8 product information (manufacturer technical bulletin)