Snap-8 was developed as a cosmetic alternative to botulinum toxin (Botox) for reducing expression lines — particularly crow's feet, forehead lines, and glabellar lines formed by repetitive facial muscle contractions. It works by partially inhibiting the SNARE complex mechanism that governs acetylcholine vesicle fusion at neuromuscular junctions, reducing but not eliminating muscle contraction.

Unlike Botox, Snap-8 is topically applied and produces a gradual, moderate reduction in muscle contraction rather than a complete block. It is typically incorporated into serums or creams at 5–10% concentrations. Research shows significant reduction in wrinkle depth and skin roughness with regular use, though effects are more subtle than injectable neurotoxins.