Melaleuca Alternifolia (Tea Tree) Leaf Extract is derived from the Australian tea tree and is valued for its antibacterial, antifungal, and anti-inflammatory properties. It is commonly used in skincare products targeting acne, blemishes, and oily skin.
| Reported effect | How often | Notes |
|---|---|---|
Skin irritation (redness, stinging, dryness) | Common | More likely at higher concentrations or on sensitive skin. |
Allergic contact dermatitis | Uncommon | Risk increases with oxidized product; sensitization can develop over time. |
Contact urticaria | Rare | Localized hives following application. |
Systemic toxicity from ingestion | Very rare | Reported only with oral ingestion, not topical cosmetic use. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.