In our reference data, Melaleuca Alternifolia (Tea Tree) Oil can feed Malassezia (fungal acne).
Tea tree oil is an essential oil distilled from Melaleuca alternifolia, valued in skincare for its antibacterial, antifungal, and anti-inflammatory properties, commonly used to target acne and minor skin infections. Its primary active component is terpinen-4-ol.
| Reported effect | How often | Notes |
|---|---|---|
| Allergic contact dermatitis | Common | A frequent sensitizer, especially with oxidized oil; redness, itching, and rash at application site. |
| Skin irritation/dryness | Common | Burning, stinging, or peeling, particularly at higher concentrations or undiluted use. |
| Increased sensitization from oxidized oil | Uncommon | Degradation products from air/light exposure raise allergenic potential over time. |
| Prepubertal gynecomastia (topical exposure) | Rare | Reported in case studies suggesting possible endocrine activity; reversible on discontinuation. |
| Systemic toxicity if ingested | Very rare | Oral ingestion can cause ataxia and CNS depression; not a topical risk but noted for safety. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.