Colorant
GUANINE
Safety score · 0–100
Good
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A natural purine (one of the DNA bases) — used as a shimmery pearlescent pigment in make-up. EU-permitted as CI 75170 with a strong safety record; the only practical caveats are sourcing and vegan status.
Skin benefits
- Natural pearlescent shimmer (fish-scale derived)
- Adds opalescent finish to make-up
- Listed as permitted EU colorant (CI 75170 / Annex IV)
- Biological molecule with no systemic toxicity
Known concerns
- Often fish-derived — not vegan
- Source-traceability and microbiological controls needed
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related colorants
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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.