WhatPeptide

Snap-8

Snap-8 is a synthetic octapeptide (acetyl octapeptide-3) studied as a topical cosmetic active for reducing the appearance of expression lines by targeting the SNARE protein complex involved in neuromuscular vesicle docking. It is marketed as a peptide alternative to botulinum toxin for cosmetic wrinkle reduction.

Preliminary evidence Unregulated Cosmetic

Written by WhatPeptide Editorial Team · Last updated 2026-03-17

Half-life

Topical activity; systemic absorption minimal

Dosage range

4-10% in topical formulations applied twice daily to target areas (cosmetic literature context)

Administration

Topical

Research level

Preliminary

How Snap-8 works

Snap-8 is a modified analog of the N-terminal fragment of SNAP-25, a component of the SNARE complex required for synaptic vesicle fusion at neuromuscular junctions. By competitively interfering with SNARE complex assembly in a topical dose-dependent manner, the peptide aims to reduce acetylcholine release and consequently diminish muscle contraction contributing to dynamic facial lines. Clinical evidence for topical penetration adequate to reach the neuromuscular junction remains limited, and studies are typically sponsored by ingredient manufacturers.

Also known as: Acetyl Octapeptide-3, SNAP-8, Leuphasyl

Research relevance

Hair & Skin
Moderate relevance 60

Side effects & safety

Skin irritation in sensitive individuals Generally well tolerated topically

Contraindications

Known peptide hypersensitivity
Avoid near eyes

Consult a healthcare provider before use if any of these apply to you.

Key studies

FAQ

What is Snap-8? +
Snap-8 is a synthetic octapeptide (acetyl octapeptide-3) studied as a topical cosmetic active for reducing the appearance of expression lines by targeting the SNARE protein complex involved in neuromuscular vesicle docking. It is marketed as a peptide alternative to botulinum toxin for cosmetic wrinkle reduction. Its mechanism of action is based on preliminary or early-stage research.
What is Snap-8 researched for? +
Snap-8 has the strongest research relevance for Hair & Skin. Evidence is based on preliminary or early-stage research.
What are the side effects of Snap-8? +
Reported side effects include Skin irritation in sensitive individuals, Generally well tolerated topically. Key contraindications: Known peptide hypersensitivity; Avoid near eyes.
Is Snap-8 FDA approved? +
Snap-8 is not FDA-approved. It is available as a research compound or through compounding pharmacies in some jurisdictions.
How is Snap-8 administered? +
Snap-8 is typically administered via topical route. Researched dosage range: 4-10% in topical formulations applied twice daily to target areas (cosmetic literature context). Half-life: Topical activity; systemic absorption minimal.

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