Flaxseed Oil
Linum Usitatissimum Seed Oil
High comedogenic rating; also oxidises quickly.

How solid is the pore-clogging number
Flaxseed Oil rates 4 of 5 — frequently implicated in breakouts on acne-prone skin. 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 list matter just as much. Check a whole label to see it in context.