What does it really mean when behind ingredients of cosmetics or foods the imprint “nano” appears?

For a better information of the consumers since Jul 2013 (cosmetics) and Dec 2014 (food) it is regulated by law (EU), that not only “titanium dioxide” is in the list of ingredients, but also the information is added, whether this is nanoscale [titanium dioxide (nano)]!

Also regulated by law is that only safe and approved ingredients may be included in cosmetics and foods, which have been sufficiently tested for possible negative effects. Therefore, this is by no means a threat notice, but only an information about the ingredients!