Ingredient
Bismuth Oxychloride
Mineral (makeup pearl) · INCI: Bismuth Oxychloride
How we read it
Highly comedogenic
A known pore-clogging ingredient. Avoid if you're acne-prone.
Why we read it this way
A pearlescent mineral common in mineral makeup. Acne-safe lists flag it and some people find it irritating, though comedogenicity evidence is mixed.
The nuance
If mineral makeup breaks you out, this is a common suspect — but reactions vary.