S-GLYOXYLOYL ACETYL CYSTEINE
Other
Moderate
About S-GLYOXYLOYL ACETYL CYSTEINE
A bond-building hair treatment ingredient that looks gentler than classic straighteners, but it is still not low-risk.
Detailed Analysis
S-GLYOXYLOYL ACETYL CYSTEINE is a specialty smoothing ingredient used in hair straightening or reshaping systems. It is positioned as an alternative to harsher formaldehyde-releasing approaches, but aldehyde-adjacent chemistry and high-heat use still raise irritation and hair-damage questions. That leaves it in a cautious middle zone rather than the clearly safe range.
What It Does
Known Concerns
- ⚠ Can irritate sensitive or damaged skin
- ⚠ Limited independent safety data
Safety Score
Moderate
Based on EU regulatory data, published safety research, and ingredient function analysis.
References
EU CosIng Database
European Commission cosmetic ingredient registry
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Download LuxSenseThis information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional for skin concerns or allergies.