Argireline (Acetyl Hexapeptide-3)

Also known as: Acetyl Hexapeptide-3, AcHex-8, Argirelin, SNAP-8 predecessor

Skin & Hair

Overview

Argireline (acetyl hexapeptide-3) is a synthetic hexapeptide inspired by the N-terminal sequence of SNAP-25, a SNARE complex protein involved in neuromuscular junction signaling. By competing with SNAP-25 for SNARE complex assembly, Argireline reduces neurotransmitter release at neuromuscular junctions and thereby attenuates the repetitive facial muscle contractions that generate dynamic expression lines. Often called 'botox in a cream,' it is one of the top-selling peptide cosmeceuticals globally with clinical evidence for wrinkle reduction.

Mechanism of Action

Argireline's sequence (Ac-Glu-Glu-Met-Gln-Arg-Arg-NH2) mimics the N-terminal residues 12-17 of SNAP-25. It competes with native SNAP-25 for incorporation into the ternary SNARE complex (SNAP-25/syntaxin/synaptobrevin). Partial disruption of SNARE assembly reduces vesicular fusion efficiency at neuromuscular junctions, lowering acetylcholine release and reducing muscle fiber contraction frequency and strength. This is mechanistically similar to botulinum toxin but the effect is partial and reversible, with no neurotoxic activity.

Potential Benefits

  • Reduction of dynamic expression wrinkles (crow's feet, forehead lines)
  • Non-invasive alternative or complement to botulinum toxin
  • Improved skin smoothness in clinical studies
  • Combination benefit with moisturizers and other cosmeceutical peptides
  • Well-tolerated with no systemic effects

Research Dosage Notes

The following reflects doses used in published research studies. This is not medical advice.

Topical: typically 5–10% in serum formulations. Used at concentrations of 2–10% in clinical studies.

Amino Acid Sequence

Ac-Glu-Glu-Met-Gln-Arg-Arg-NH2

Side Effects & Safety

  • Well-tolerated topically
  • Rare skin irritation at high concentrations

Synergistic Compounds

The following compounds have been studied alongside Argireline (Acetyl Hexapeptide-3) for potential complementary or synergistic effects:

GHK-CuMatrixylLeuphasylBotulinum toxin

Learn More

Beginner's GuideNew to peptides? Start hereStacking GuideSynergistic combinationsAdministration RoutesSubQ, IM, oral, nasal & moreReconstitution CalculatorCalculate exact dosingPeptides vs SARMsFull comparisonHow Peptides Are MadeSPPS, purification & QC

References & Further Reading

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