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Farnesol

Sesquiterpene alcohol with a mild floral scent, a component of neroli and jasmine oils. Listed among the 26 EU fragrance allergens.

Evidence by route

C

Topical application

Appears on the mandatory label declaration at 0.001%+ in leave-on cosmetics. Positive patch-test frequency is around 0.5–1%.

How to read tiers A–F
  • CWeak evidence. In vitro data, open-label studies, or expert consensus

Tolerability and safety

Irritation potential
Medium
Allergen risk
High
Pregnancy
Caution
Suitable for
Normal
Use with caution
Sensitive, Dry

For sensitive skin

Sensitive skin and people with known perfume allergies should avoid products containing farnesol.

About this ingredient

Farnesol is a sesquiterpene alcohol with a mild floral scent. Found in neroli, jasmine, ylang-ylang, citronella essential oils. Where applied. Perfumery, scented cosmetics, deodorants. On its own shows mild antibacterial action against Corynebacterium and Staphylococcus aureus – appears in deodorant formulas as a "natural" agent. Contact allergy. On the EU list of 26 fragrance allergens. SCCS 2017 rated farnesol as a moderate sensitizer. Patch-test reactions in 0.5-1% of patients with suspected fragrance allergy (Hagvall 2007). Safety. IFRA Restriction: up to 1.2% in finished leave-on skin products. SCCS confirmed safety within these limits. Does not photosensitize. Pregnancy and lactation – use with caution. No direct teratogenicity data, but avoid in sensitive skin and atopy. Alternatives for allergic patients: fragrance-free and hypoallergenic fragrance.

Frequently asked questions

Is Farnesol safe during pregnancy?

Farnesol should be used with caution during pregnancy. Consulting a dermatologist or OB-GYN is advisable.

What skin types is Farnesol for?

Farnesol suits: normal. Use with caution in: sensitive, dry.

Can Farnesol irritate the skin?

Farnesol has moderate irritation potential. Sensitive skin may show a transient reaction that usually settles with adaptation.

Can Farnesol cause an allergic reaction?

Farnesol has high allergen potential. Perform a patch test on the inner forearm 24 hours before facial application.

What is Farnesol and what does it do in cosmetics?

Sesquiterpene alcohol with a mild floral scent, a component of neroli and jasmine oils.

What's the INCI name for Farnesol?

The INCI name is Farnesol.

See Farnesol in a product composition right on the store page

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