Tea Tree Oil
Melaleuca Alternifolia Leaf Oil
1Very low risk. Unlikely to clog pores for most people.
Evidence for mild-to-moderate acne at around 5%. Must be diluted; sensitising neat.
What it does
antimicrobial
How solid is that number
The rating is graded established. Traceable to published comedogenicity testing and consistent across sources.
It describes the raw ingredient in isolation. In a finished product, how much is present and where it sits in the ingredient list matter just as much. Run the whole label through the checker to see it in context.
