Catalog classification, reference sizes, lab math links, and source-backed data. Educational use only — not medical advice.
Researched for: Leuphasyl evidence and protocol review
Also known as: Pentapeptide-18
Leuphasyl (Pentapeptide-18) binds enkephalin receptors on the pre-synaptic neuron, inhibiting calcium influx and thereby reducing acetylcholine release - a third distinct mechanistic category among cosmetic anti-wrinkle peptides, alongside SNARE-complex inhibitors (Argireline, SNAP-8) and collagen-signaling peptides (Matrixyl family).
Catalog descriptions reflect research context only. Not a medical claim or treatment recommendation.
Data source: Primary literature, regulator records, trial registries, and identity-specific evidence search
Reflects preclinical/research literature context only. Not a medical claim, dosing instruction, or treatment recommendation.
Leuphasyl is pentapeptide-18. Published clinical support is sparse and heavily manufacturer-associated; the ingredient percentage is not a direct-use instruction for raw peptide.
Supplementary research context only. Not medical advice or a treatment recommendation.
Best-effort summary of forum/Reddit discussion. This is anecdotal community commentary, not a scientific source, and does not count toward this record's verification status. Do not treat it as established fact or medical guidance.
Reddit discussion on Leuphasyl is sparse -- it's a niche, harder-to-find ingredient (one user described it as mostly showing up in a single pricey French serum, with 'shady looking' unbranded versions on marketplaces like eBay). One user reported a visible improvement after about two weeks using a smaller indie brand's formulation. Not enough discussion volume to call this a real community consensus -- treat as a single early report, not verified science.
Thin thread: one user reports 2-week visible improvement with a niche brand; ingredient is hard to find in mainstream formulations.
General community roundup of popular cosmetic signal peptides used for skin/anti-aging; covers this peptide class broadly. Crowd-sourced, not clinically verified.
Found a relevant Reddit or forum thread about this compound? Suggest it below. Every suggestion is reviewed by an editor before it appears -- nothing is published automatically.
Research Use Only. All content is for educational and research reference only. Not medical advice, a treatment recommendation, or guidance on human use. Compounds are not FDA-approved drugs unless specifically noted.