Does Palmitoyl tetrapeptide-7 work?
No meaningful testing published.
The only peer-reviewed publication identified is a 2018 industry safety assessment, which addresses toxicity, not benefit. The efficacy claims, including the widely quoted wrinkle reductions for the Matrixyl 3000 blend, come from the manufacturer's unpublished testing of a two-peptide combination. No independent human trial of palmitoyl tetrapeptide-7 alone exists in these sources. 1
These sources contain no published controlled trial of palmitoyl tetrapeptide-7 in people. Matrixyl 3000 has clinical figures, such as less wrinkle depth and smoother skin. They come from the maker's own tests of the two-peptide blend. No peer-reviewed journal has published them in a form that isolates this peptide. 1
Evidence checklist
- Randomised controlled trial No controlled trial of this peptide
- Human study over 100 people No published human trial
- More than one research group Efficacy figures are manufacturer data
- Clinical outcomes, not surrogate markers Wrinkle numbers from unpublished blend tests
- Human safety data beyond case reports Industry safety review: safe in cosmetics
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Citations
- Johnson 2018 (Cosmetic Ingredient Review), Int J Toxicol: safety assessment of tripeptide-1, hexapeptide-12, their metal salts and fatty acyl derivatives, and palmitoyl tetrapeptide-7 pure.psu.edu
- FDA: how cosmetics are not FDA-approved but are FDA-regulated fda.gov
Reference information only, not medical advice. Drawn from the Palmitoyl tetrapeptide-7 article, fact-checked against the cited sources. No dosing anywhere on this site.