Hexapeptide-9
Hexapeptide-9 is a cosmetic peptide investigated in skin-formulation research. It should not be confused with caffeoyl hexapeptide-9 or another chemically modified ingredient.
At a glance
- Regulatory status
- Cosmetic ingredient; cosmetic marketing or an ingredient listing is not FDA drug approval. Claims and intended use determine regulatory treatment.
- Research context
- Hexapeptide-9 is a cosmetic peptide investigated in skin-formulation research. It should not be confused with caffeoyl hexapeptide-9 or another chemically modified ingredient.
What this is
- Hexapeptide-9 is a cosmetic peptide investigated in skin-formulation research. It should not be confused with caffeoyl hexapeptide-9 or another chemically modified ingredient.
What this isn't
- A recommendation to use, prepare, combine, or administer a product
- Evidence that a related molecule or a differently formulated product has the same effects
Key terms
Hexapeptide-9 is a cosmetic peptide investigated in skin-formulation research. It should not be confused with caffeoyl hexapeptide-9 or another chemically modified ingredient.
A 2025 study paired hexapeptide-9 with an ionic liquid made from GABA and lactic acid to improve skin delivery. The researchers examined barrier interactions, oxidative stress and matrix-related signaling. The carrier is part of the proposed mechanism; its effects cannot be removed from the interpretation of the combined system. Primary paper.
Evidence limits
How to read the evidence
The main unanswered question for a shopper is whether the exact finished product has a controlled human comparison with meaningful appearance outcomes. The reviewed publication is a useful delivery-system study, but it does not establish durable wrinkle reduction, treatment of a skin disease, or benefit attributable solely to the peptide. The two linked records describe the same study, not independent replication.
Sources appraised 2026-10-28. Educational information; not medical advice. Study findings apply to the populations, preparations and outcomes described.
External sources and citations
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