Other
THYMINE
Safety score · 0–100
Excellent
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
Thymine is a cosmetic ingredient used in product formulations. Exercise caution due to limited available safety data.
Thymine (5-methyluracil) is a pyrimidine nucleobase that occurs naturally in DNA, where it pairs with adenine. In cosmetic applications, it is occasionally incorporated into skincare formulations for its alleged DNA repair and anti-aging benefits, though evidence is limited. It is not a regulated cosmetic ingredient in the EU and is considered biologically benign at cosmetic use levels. No hazard classifications or EU Annex restrictions apply to this substance.
Skin benefits
- Nucleobase component of DNA
- Potential cellular repair support (limited evidence)
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.