Conditioning Agent
SR-(METHIONYL STURGEON POLYPEPTIDE-1)
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A lab-made fusion peptide used for skin or hair conditioning claims, with limited real-world safety data.
sr-(Methionyl Sturgeon Polypeptide-1) is a single chain recombinant peptide, produced by fermentation in E. coli. The starting gene is synthesized by the fusion of the gene from Sturgeon Polypeptide-1 with the initiation code for methionine. The fusion peptide contains 191 amino acids which may contain disulfide bonds and/or glycosylation, and consists of the proper sequence of the 20 standard amino acids. This is a recombinant fusion peptide produced by fermentation, so dermal exposure is usually low and the molecule is used at small concentrations. The main uncertainty is not classic toxicity but limited independent safety data for this exact sequence and the need for tight manufacturing control.
Function
Skin benefits
- Supports the skin barrier
Known concerns
- Limited independent human safety data
- Possible irritation in very sensitive skin
- Manufacturing purity matters
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related conditioning agents
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.