Argireline
Cosmeceutical / Neuromuscular Peptidecommercial (cosmetic ingredient)Also known as: Acetyl Hexapeptide-3, Acetyl Hexapeptide-8, Leuphasyl
A synthetic hexapeptide that inhibits neurotransmitter release at the neuromuscular junction, reducing facial muscle contraction and wrinkle formation — often called 'Botox in a bottle'.
Overview
Argireline (acetyl hexapeptide-3/8) is a synthetic peptide developed by Lipotec (now part of Lubrizol) consisting of six amino acids with an N-terminal acetyl group. It is a fragment of SNAP-25, a protein essential for the SNARE complex that mediates neurotransmitter vesicle fusion at the neuromuscular junction. By competing with native SNAP-25, Argireline destabilizes the SNARE complex, reducing acetylcholine release and thereby decreasing the intensity of facial muscle contractions responsible for expression lines. Unlike botulinum toxin (Botox), which cleaves SNARE proteins irreversibly, Argireline's mechanism is competitive and reversible, resulting in a subtler, non-paralytic effect. Clinical studies have demonstrated 10-30% wrinkle depth reduction with consistent topical use, making it the most popular peptide-based anti-wrinkle ingredient in cosmetics.
Mechanism of Action
Argireline acts at the neuromuscular junction: (1) Mimics the N-terminal domain of SNAP-25, a critical SNARE complex component; (2) Competes with native SNAP-25 for binding within the SNARE complex; (3) Destabilizes the SNARE complex formation, reducing synaptic vesicle docking and fusion; (4) Decreases acetylcholine release at the neuromuscular junction; (5) Results in reduced facial muscle contraction intensity (not paralysis); (6) Effect is reversible and dose-dependent, unlike botulinum toxin's irreversible cleavage.
Molecular Formula
C34H60N14O12S
Molecular Weight
888.98 g/mol
Sequence
Ac-Glu-Glu-Met-Gln-Arg-Arg-NH2
Dosage Protocols
Dose Range
5% concentration – 10% concentration
Frequency
Twice daily
Route
topical
Cycle Length
Ongoing — measurable results in 2-4 weeks, optimal results at 8-12 weeks
Apply to clean skin, focusing on expression line areas (forehead, crow's feet, glabella). Best results at 10% concentration. Can be layered under moisturizer and sunscreen. Compatible with most other actives.
Source: Manufacturer data (Lipotec) and clinical studies
🧮 Personalized Dosage Calculator
💰 Estimated Pricing
Typical Supply
30mL serum (10% solution)
Last Updated
2026-02
Acetyl hexapeptide-3. Widely available in cosmetic serums. OTC pricing. 'Botox in a bottle' marketing.
⚠️ Prices are estimates based on publicly available data and may vary significantly by vendor, location, and prescription status. This is not medical or financial advice.
Side Effects
| Effect | Severity |
|---|---|
| Mild skin irritation | mild |
| Dryness | mild |
| Allergic reaction | moderate |
Pros & Cons
Non-invasive topical alternative to Botox injections with measurable wrinkle reduction (10-30%)
Reversible mechanism — no risk of permanent muscle paralysis or frozen appearance
Excellent safety profile with minimal side effects even at high concentrations
Widely available, affordable, and compatible with other skincare ingredients
Significantly less potent than Botox — results are subtle rather than dramatic
Limited skin penetration means only a fraction reaches the neuromuscular junction
Requires continuous use; effects reverse upon discontinuation
Many commercial products contain concentrations below the effective threshold
Research Studies
🩸 Blood Work
No specific bloodwork requirements reported for this peptide. General health panels are always recommended before starting any peptide protocol.
Legal Status
Widely available as a cosmetic ingredient. Not classified as a drug. No prescription required. One of the most commonly used peptides in commercial skincare worldwide.
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