Rosemary oil
Rosmarinus Officinalis Leaf Oil
Strong interest for hair growth; small trials compare it to minoxidil 2%.
How solid is the pore-clogging number
Rosemary oil rates 2 of 5 — fine for most, occasionally a problem for very acne-prone skin. The rating is graded moderate. Reasonably supported, but from fewer or less direct sources than the best-established ratings.
It describes the raw ingredient in isolation. In a finished product, how much is present and where it sits in the list matter just as much. Check a whole label to see it in context.