Is farnesol safe because it's natural?

Farnesol is a naturally occurring fragrance compound found in essential oils, but being natural does not mean it cannot cause allergic reactions. Published assessments have documented moderate sensitization potential, particularly with repeated or prolonged exposure. The EU lists it as a fragrance allergen requiring label disclosure.

fragrance · preservative

Farnesol

Watch if sensitive·Strong evidence

Farnesol is a natural fragrance and mild antimicrobial found in essential oils, and it is one of the EU-listed allergens requiring label disclosure. It has moderate documented sensitization potential, more so with repeated or prolonged exposure.

Worth knowing

EU-labelled fragrance allergen
Known contact sensitizer for some
Restricted in the EU

EU named-label disclosure required above 0.001% leave-on / 0.01% rinse-off.

Gentler alternatives

Linalool

Questions

Is farnesol safe because it's natural?: Farnesol is a naturally occurring fragrance compound found in essential oils, but being natural does not mean it cannot cause allergic reactions. Published assessments have documented moderate sensitization potential, particularly with repeated or prolonged exposure. The EU lists it as a fragrance allergen requiring label disclosure.

Products with Farnesol

References

Cosmetic information for general education, not medical advice. A verdict is a reading of the published evidence, never a guarantee for your skin: any ingredient can irritate someone, so patch test new products and see a professional if you react. Concern is graded on cited evidence, never on hazard-score lists. See how we score.