Ingredient glossary
Tea Tree Oil
INCI: Melaleuca Alternifolia Leaf Oil · Also: TTO
A reasonable supporting ingredient. It helps a formula without being the star.
What it does
- anti acne
- antimicrobial
- anti inflammatory
moderate evidenceRandomized double blind trials using five percent gel show greater reductions in lesion counts and acne severity index than placebo yet systematic reviews emphasize the small number and variable quality of studies.
On a label: usually effective at 5%.
Who it's for, and who should skip it
Tends to suit
- oily
- acne prone
- combo
Approach with care
- very sensitive
- rosacea
- eczema
- fragrance allergy
- Clogs poresModerate
- Irritation riskModerate
Pregnancy: Check with your doctor before using during pregnancy or breastfeeding.
Plays well with
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Educational information about a cosmetic ingredient, not medical advice.