Tea Tree Oil

INCI: Melaleuca Alternifolia (Tea Tree) Leaf Oil

Essential oil with antibacterial activity against C. acnes. Terpinen-4-ol is the main active component. Acne efficacy confirmed, but irritation is possible.

Acne

Evidence by route

Topical application

Limited evidence. One RCT or several controlled studies with limitations.

RCTs showed that 5% tea tree oil gel is slower than benzoyl peroxide but comparable in final efficacy for mild-to-moderate acne. Tolerability is better than benzoyl peroxide.

Bassett IB et al. Med J Aust. 1990;153(8):455-458.
Enshaieh S et al. Indian J Dermatol Venereol Leprol. 2007;73(1):22-25.

Working concentrations

5% in acne products

Tolerability and safety

Irritation potential

Medium

Allergen risk

Moderate

Pregnancy

Caution

For sensitive skin

Oxidized tea tree oil is a potent sensitizer. Do not use old or improperly stored bottles.

Skin types

Suitable for

OilyCombination

Use with caution

SensitiveDry

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Frequently asked questions

Is Tea Tree Oil safe during pregnancy?

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

What skin types is Tea Tree Oil for?

Tea Tree Oil suits: oily, combination. Use with caution in: sensitive, dry.

Can Tea Tree Oil irritate the skin?

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

What is Tea Tree Oil and what does it do in cosmetics?

Essential oil with antibacterial activity against C.

What's the INCI name for Tea Tree Oil?

The INCI name is Melaleuca Alternifolia (Tea Tree) Leaf Oil. It may also appear as: Melaleuca Alternifolia Leaf Oil, Tea Tree Oil.

What concentration of Tea Tree Oil is effective?

Published: April 13, 2026 · updated: April 22, 2026