Comment by verall

I'm not really confident at all since the paper you linked doesn't mention anything about it and I'm no expert in small particles.

My intuition though, given this line from the paper:

> TiO2 is used extensively in many commercial products, including paints and varnishes, cosmetics, plastics, paper, and food as an anticaking or whitening agent.

is that TiO2 in food where it is primarily eaten might less risky than existing exposure in i.e. paint.

Like I said, I'm no expert, but nearly any small particle (flour, ground spices, SiO2, etc) are serious occupational risks for airborne exposure but are not considered to be dangerous to consume.

Given this, the paper you linked isn't very convincing to me about needing to ban TiO2 in food, but is yet more info that nearly every industrial worker probably needs PAPRs to avoid serious increase in cancer risk from small airborne particulates.