Hair reducing agent
GLYCERYL THIOPROPIONATE
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
Glyceryl thiopropionate is a thiol-bearing ester used in hair waving and reducing systems. Sparse safety data and typical reducing-agent irritation risks place it in the orange tier.
Skin benefits
- Thiol donor with potential antioxidant role
- Used in hair waving and reducing formulations
- May condition damaged hair
- Can support disulfide rearrangement
Known concerns
- Thiol odor can be unpleasant in formulation
- Reducing agents may weaken hair if overused
- Limited cosmetic safety data published
- Possible skin irritation at active levels
- Stability and oxidation issues
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.