titanium dioxide nanoparticles
... that titanium dioxide nanoparticles prevent cancer when used in sunscreens, but may cause it if inhaled by production workers?
... that <b id="mwA_g"><a href="./Titanium_dioxide_nanoparticle" id="mwA_k" rel="mw:WikiLink" title="Titanium dioxide nanoparticle">titanium dioxide nanoparticles</a></b> prevent cancer when used in <a href="./Sunscreen" id="mwA_o" rel="mw:WikiLink" title="Sunscreen">sunscreens</a>, but may cause it if inhaled by production workers?<!--Special occasion hook for October 9-->