Specimen No. 0157
CautionAnimalthickener
Shellac (Cosmetic Grade)
shellac · lac resin · purified lac
A natural resin secreted by the lac beetle, used as a binder and film-former in mascara and nail products. The CIR approves concentrations up to 6% with no irritation or sensitization in controlled testing. However, clinical reports of allergic contact dermatitis in mascara users have been documented.
medium confidence
Researched April 18, 2026Specimen 0157Shellac (Cosmetic Grade)
Concerns
- Allergic contact dermatitis reported in sensitive individuals using shellac-based mascara
- Not vegan — insect-derived from lac beetles
- Sensitization potential variable by shellac source and processing
Documented benefits
✓ naturally-sourced
Commonly found in
MascaraEyelinerNail polish topcoatHair sprayCandy coating
Sources & references
Last researched: April 18, 2026
Research disclaimer: This rating is based on available peer-reviewed research and regulatory assessments at the time of publication. It is not medical advice. Consult a qualified professional for personal health or skin concerns.
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