Does Acetyl tetrapeptide-5 work?
No meaningful testing published; the maker reports a 20-person test that was never published in a journal.
The claims for reducing under-eye puffiness come from the manufacturer's product documentation and ingredient databases that repeat it. No peer-reviewed human trial, animal study or cell study of acetyl tetrapeptide-5 could be found, so the largest human sample is zero. 12
The maker reports smaller eye bags and fewer dark circles after 14 days of use. INCIDecoder sums up the study behind this. Twenty volunteers used a product with a very small amount of the pure peptide. By day 15, 70% had improved. By day 60, 95% had improved, mostly slightly or moderately. The study appears in product literature. No journal has published it. So we cannot judge its design, controls or measures. No independent human study exists. 12
Evidence checklist
- Randomised controlled trial No published trial; maker study unpublished
- Human study over 100 people No published human sample
- More than one research group Only manufacturer data
- Clinical outcomes, not surrogate markers Appearance claims only, unpublished
- Human safety data beyond case reports No peer-reviewed safety data
Read the full Acetyl tetrapeptide-5 page
More on Acetyl tetrapeptide-5
Citations
- Lubrizol: Eyeseryl peptide solution product data lubrizol.com
- INCIDecoder: acetyl tetrapeptide-5 ingredient entry incidecoder.com
- FDA: how cosmetics are regulated but not approved fda.gov
- FDA: is it a cosmetic, a drug, or both? fda.gov
Reference information only, not medical advice. Drawn from the Acetyl tetrapeptide-5 article, fact-checked against the cited sources. No dosing anywhere on this site.