Limonene

Monoterpene with citrus scent, a natural component of lemon and orange essential oils. Listed among the 26 mandatory EU fragrance allergens.

Evidence by route

Topical application

Weak evidence. In vitro data, open-label studies, or expert consensus.

Oxidized limonene ranks among the top fragrance allergens by positive patch-test frequency. Listed separately on labels at 0.001%+ in leave-on cosmetics.

Tolerability and safety

Irritation potential

Medium

Allergen risk

High

Pregnancy

Caution

For sensitive skin

Oxidizes on air to highly allergenic hydroperoxides. Sensitive and atopic skin should avoid it.

Skin types

Suitable for

Normal

Use with caution

SensitiveDry

Frequently asked questions

Is Limonene safe during pregnancy?

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

What skin types is Limonene for?

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

Can Limonene irritate the skin?

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

Can Limonene cause an allergic reaction?

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