Synthetic cosmetic octapeptide; proposed SNAP-25/SNARE-pathway modulator

SNAP-8

aka Acetyl octapeptide-3

Evidence grade
Grade C: Preliminary human data
for topical anti-wrinkle
User score too few reports (8) needs ≥ 10 reports
US FDA Not approved checked 2026-11-13
WADA 2026 Not named no clearance either · checked 2026-11-13
EU Specific EMA medicinal authorization not found. Cosmetic ingredient naming or an inventory entry does not itself establish approval; finished-product safety and classification requirements still apply. · checked 2026-11-13

Grade note: Human data only from multi-ingredient cosmetic products.

Goals: Longevity · Skin & hair Compare with another peptide →

User reports

approximate — combined from two independent Reddit reads

Men 45–60

0 men aged 45–60

No reports in this group yet.

All men

0 men

No reports in this group yet.

Everyone

8 people

small sample · n = 8

Outcome positive 4 of 8 · no effect 2 of 8 · unclear 2 of 8

Benefits skin 4 of 8

Side effects none reported

Stopped 0 of 8 Used with other compounds 3 of 8

User reports are anecdata, not evidence: self-selected, unverified, often combined with other compounds.

In their words

  • “This is the only ingredient that has ever produced a noticeable improvement in skin-feel and hydration for me”

  • “I haven’t seen any improvements after 2 months on GLOW and snap8.”

  • “You have to be consistent with it, I used it weekly for 8-9 wks. Helped with skin elasticity and overall texture.”

Read summaries and method notes

Read 1. No seed and no accessible thread, so n=0 everywhere.

Read 2. No male reporter. Eight users: 4 positive (smoother texture, plumping, elasticity, softer forehead lines after about eight weeks of topical use), 2 no effect (one after two months), 2 unclear. Mostly topical; routines often included hyaluronic acid, GHK-Cu or microneedling. A small cosmetic-skincare sample.

Note 1. No SNAP-8 threads available; zero counts reported.

Note 2. Very sparse and overwhelmingly topical/cosmetic; routines contained other actives or microneedling.

Each read counted people independently. Overlap between the two reads is estimated from shared threads and removed; counts are approximate. How we count.

Summary

SNAP-8 is a synthetic cosmetic octapeptide used in products intended to improve the appearance of wrinkles. Human studies have evaluated formulations containing it alongside other ingredients; they have not established its independent contribution or an effective injectable treatment. The evidence supports cautious interest in specific tested cosmetic products, not equivalence to botulinum toxin. Patch study, serum study

No FDA drug approval or specific EMA medicinal authorization was found. Cosmetic sale and ingredient naming do not establish drug approval, efficacy or injectable safety. FDA, European Commission

Proposed mechanism

The proposed mechanism is interference with SNAP-25/SNARE-associated neurotransmitter release, with the aim of reducing expression-related facial contraction. SNAP-8 is an extended analogue of a shorter acetyl hexapeptide, but results from that different molecule do not establish octapeptide efficacy. A published analytical study measured SNAP-8 in microneedle patches; it did not test facial muscle relaxation or show that an ordinary cream delivers an effective concentration to human neuromuscular junctions. Analytical paper

Microneedle formulations are designed to overcome the skin barrier. Any observed effect can also depend on the patch, hyaluronic acid and other active ingredients. Thus a smoother skin surface does not by itself demonstrate inhibition of neurotransmission. Clinical patch study

Safety

  • Small, short cosmetic product studies cannot establish rare-event or systemic safety
  • Two serum-study participants reported irritation or discomfort, judged unrelated by investigators
  • Microneedling has procedure-related infection, bleeding and pigment-change risks
  • No established human injectable dosing or safety evidence found
  • Cosmetic product tolerability does not validate raw-powder injection or homemade mixtures

From labels, regulators and trials. No signal in small studies ≠ safe.

Evidence C topical anti-wrinkle

C stands, at the bottom of C. Four small human cosmetic studies, all of multi-ingredient products, none isolating SNAP-8. Graded the same way as pinealon; see the note there.

Human trials · 4

  1. PMID 390826572024Comparative split-face study, 28 days; 21 completed; random allocation and blinding not established in the retrieved methods 24 people

    Adults aged 30–65 with eye wrinkles

    A microneedle patch containing SNAP-8 plus two other actives improved wrinkle measurements relative to a hyaluronic-acid-only patch; cannot isolate SNAP-8's contribution. Source

  2. PMID 311347512020Single-center 12-week cosmetic product study, published online in 2019; sample size and comparator details not found in accessible primary abstract size not reported

    Healthy subjects with aged skin

    Multi-ingredient microneedle patches were associated with a 25.8% reduction in fine lines/wrinkles; this is not an isolated SNAP-8 effect.

  3. PMID 35426243202312-week uncontrolled whole-face serum study; online publication 2022; n is completers 31 people

    Women aged 35–55

    Wrinkle and hydration measures improved from baseline with a multi-ingredient serum; ex vivo comparisons in the same paper are not a controlled human trial. Source

  4. PMID 27602972201614-week single-center open-label serum and supporting skincare-regimen study 29 people

    Women with mild to moderate facial photodamage

    Several facial-line measures improved from baseline; multiple peptides, GABA and the supporting regimen prevent attribution to SNAP-8. Source

Bar length = trial size on a log scale.

Dose ranges

Reported ranges from labels and studies, with context. Not a recommendation.

  • Clinical study, combination dissolving microneedle patch
    0.03% SNAP-8 in a patch also containing 5% ascorbyl glucoside and 4% sodium cyclic lysophosphatidic acid; nightly for 14 days, then every third day through day 28; delivered peptide mass not found Source
  • Clinical study, multi-ingredient topical serum
    Twice-daily application for 12 weeks; isolated SNAP-8 concentration and applied peptide mass not found Source

Editorial ratings EDITORIAL

Editors’ judgement, 0–5. Opinion, not data; separate from grade and user score.

Not rated yet.

Sources

  1. pmc.ncbi.nlm.nih.gov/articles/PMC11291098/
  2. pmc.ncbi.nlm.nih.gov/articles/PMC10084013/
  3. pubmed.ncbi.nlm.nih.gov/27602972/
  4. fda.gov/cosmetics/cosmetic-products/wrinkle-treatments-and-other-anti-aging-products
  5. wada-ama.org/sites/default/files/2025-09/2026list_en_final_clean_september_2025.pdf
  6. pubmed.ncbi.nlm.nih.gov/39082657/
  7. pubmed.ncbi.nlm.nih.gov/31134751/
  8. pubmed.ncbi.nlm.nih.gov/35426243/
  9. pmc.ncbi.nlm.nih.gov/articles/PMC11291098/?pdf=1
  10. pmc.ncbi.nlm.nih.gov/articles/PMC12245253/
  11. pmc.ncbi.nlm.nih.gov/articles/PMC13584236/
  12. fda.gov/medical-devices/aesthetic-cosmetic-devices/microneedling-devices
  13. fda.gov/media/94155/download
  14. fda.gov/advisory-committees/advisory-committee-calendar/july-23-24-2026-meeting-pharmacy-c

Reddit threads read · 3

14 further sources on commercial or non-primary hosts not listed.

Research checked 2026-11-13.