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Tea tree oil
Also called: Melaleuca oil, Melaleuca alternifolia
An essential oil from the leaves of an Australian tree. It's applied to the skin, always diluted, for its antimicrobial effects. It is toxic if swallowed.
Commonly used for
- Mild acne (some studies)
- Athlete's foot and fungal skin infections
- Nail fungus (limited evidence)
- Dandruff (in shampoos)
Found naturally in
- Not a food. It is distilled from the leaves of the tea tree.
Label red flags
- No percentage of tea tree oil listed
- Old or opened bottles left in light or heat. Oxidized oil is more likely to irritate skin.
Check with a provider
- Never swallow it. It is toxic by mouth. Keep it away from children and pets, especially cats.
- Sensitive skin, eczema, or a history of reactions to essential oils. Patch test first.
- Stop if you get redness, itching, or a rash
- Use in children, or repeated use on young boys: ask your provider first (some case reports link it to hormone effects, though this is debated)
Supplements that contain it
Brand nameProduct nameAcne washes and spot treatmentsComing soon
Brand nameProduct nameAntifungal foot productsComing soon
Brand nameProduct nameDandruff shampoosComing soon
Brand nameProduct nameAcne washes and spot treatmentsComing soon
Brand nameProduct nameAntifungal foot productsComing soon
Brand nameProduct nameDandruff shampoosComing soon
Parts of the body it affects
Explore what each area does and the conditions that can affect it.
Illustrations: Servier Medical Art, CC BY 4.0
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Dr. Lesher is a naturopathic doctor who specializes in women's autoimmune and chronic conditions. Since 2020, she has helped more than 900 patients overcome and heal from their conditions.