Hair Conditioning
BIS-GLYOXYLOYL CYSTINE
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A cystine derivative with reactive glyoxyloyl groups, used as a hair bond-builder. Promising for repair products; the reactive aldehyde chemistry warrants caution at high levels.
Function
Skin benefits
- Hair bond-rebuilder via cystine disulfide chemistry
- Reduces breakage in chemically processed hair
- Targeted active for hair repair
Known concerns
- Reactive aldehyde-functional group (glyoxyloyl)
- Limited published safety dossier
- Niche bond-building active
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related hair conditionings
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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.