Your report on the need to establish safety regulations for nanomaterials focuses largely on US initiatives (Nature 480, 160–161; 2011). Other initiatives are also making important contributions.

The Organisation for Economic Co-operation and Development (OECD) provides guidance on what parameters should be used for reporting the safety testing of nanomaterials (see go.nature.com/yiaxnd). Projects set up to aid implementation of Europe's REACH (for 'registration, evaluation, authorisation and restriction of chemicals') legislation advise on how to review information on nanomaterials.

The European Food Safety Authority published guidance last year on risk assessment of nanotechnologies in the food chain (see go.nature.com/7131fo). The European Commission's Joint Research Centre has also set up a repository of representative nanomaterials samples.