Titanium dioxide nanoparticles are used in sunscreens, cosmetics and food Food grade titanium dioxide accumulation leads to cellular alterations in colon cells after removal of a 24-hour exposure Carolina Rodríguez-Ibarra 1, Estefany I Medina-Reyes 1, Alejandro Déciga-Alcaraz 2, Norma Laura Delgado-Buenrostro 1, Ericka Marel Quezada-Maldonado 3, Octavio Ispanixtlahuatl-Meráz 1, Adriana Ganem-Rondero 4, José Ocotlán