Catalog classification, reference sizes, lab math links, and source-backed data. Educational use only — not medical advice.
Researched for: under-eye edema and skin glycation
Also known as: Eyeseryl
Acetyl Tetrapeptide-5 is a cosmetic peptide that inhibits angiotensin-converting enzyme (ACE) activity locally in skin and reduces glycation of dermal proteins. It decreases capillary permeability and edema, which is the basis for its status as the standard peptide active ingredient in eye-contour products specifically targeting under-eye puffiness and dark circles.
Catalog descriptions reflect research context only. Not a medical claim or treatment recommendation.
Data source: Cosmetic-peptide formulation literature
Reflects preclinical/research literature context only. Not a medical claim, dosing instruction, or treatment recommendation.
No independent peer-reviewed study of Acetyl Tetrapeptide-5 (Eyeseryl) was found. The frequently-cited under-eye puffiness study is manufacturer-sponsored and has not been independently replicated in published literature. Left unverified rather than force a second vendor-derived source. Liquid serum typically sold as a 10-30 mL dropper bottle. Commercial citation removed; no neutral primary or regulatory source was located in this audit. Commercial formulation directions were removed and are not treated as a validated research protocol.
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 skincare communities generally describe Acetyl Tetrapeptide-5 (marketed as Eyeseryl) as an eye-area peptide aimed at reducing puffiness and dark circles, with mixed anecdotal results. A community-compiled peptide guide rates it as having only modest, inconsistent effectiveness compared to more established peptides like Matrixyl 3000. No peer-reviewed human clinical trial was located during this review; this reflects informal community opinion only, not scientific verification.
Community-compiled peptide list: Eyeseryl (Acetyl Tetrapeptide-5) rated as modestly/inconsistently effective for eye puffiness and dark circles, less studied than Matrixyl 3000 or copper peptides.
General community roundup of popular cosmetic signal peptides used for skin/anti-aging, including tetrapeptides; covers the peptide class broadly. Crowd-sourced, not clinically verified.
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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.