Regardless of nanoparticles (and I'm not one to consider TiO2 to be harmful), there are better reasons to wash your food: microbial, pesticide, and herbicide co

Regardless of nanoparticles (and I'm not one to consider TiO2 to be harmful), there are better reasons to wash your food: microbial, pesticide, and herbicide contamination. I'd say that concerns about titanium dioxide are very, very far down the list of things I'd worry about.