Titanium dioxide (TiO2) has been classified as a possible human carcinogen through inhalation since 2006. This nanomaterial was used as a food coloring and opacifying agent (E171) until it was banned for use in food as a precautionary measure in France in 2020 and by the European Union in 2022. However, it is still widely used in many everyday products (toothpaste, sunscreen, make-up, medications, plastic, paper, paint, etc.).
Titanium dioxide nanoparticles found in milk and infant formula despite food ban
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