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    EFSA begins public consultation on guidance for the risk assessment of nanoscience and nanotechnology applications

    Date : 1396/11/06 Visit : 209
    The European Food Safety Authority (EFSA) opened a public consultation on its draft guidance for the risk assessment of nanoscience and nanotechnology applications in the food and feed chain.

    The guidance covers the relevant areas within EFSA’s remit, such as novel foods, food contact materials, food and feed additives and pesticides. EFSA notes that the guidance takes account of scientific developments that have taken place since publication of the previous guidance in 2011, particularly studies that offer new insights into exposure assessment and hazard characterisation of nanomaterials.

    The guidance considers potential future developments suggested in the scientific literature for nano-encapsulated delivery systems and nanocomposites in applications such as novel foods, food/feed additives, biocides, pesticides and food contact materials. 

    Therefore, EFSA states, the guidance has taken account of relevant new scientific studies that provide more insights to physiochemical properties, exposure assessment and hazard characterisation of nanomaterials. It specifically elaborates on physiochemical characterisation of nanomaterials in terms of how to establish whether a material is a nanomaterial, the key parameters that should be measured, the methods and techniques that can be used for characterisation of nanomaterials and their determination in complex matrices.

    It also details the aspects relating to exposure assessment and hazard identification and characterisation. In particular, according to EFSA, the guidance discusses nanospecific considerations relating to in vivo/in vitro toxicological studies and outlines a tiered framework for toxicological testing. Depending on the initial tier results, studies may be needed to investigate reproductive and developmental toxicity, immunotoxicity, allergenicity, neurotoxicity, effects on gut microbiome and endocrine activity. 

    The guidance touches upon the possible use of read across to fill data gaps, in vitro digestion, toxicokinetics, and genotoxicity, as well as general issues relating to in vitro testing of nanomaterials. The guidance also discusses the potential use of integrated testing strategies and the knowledge of modes/mechanisms of action. The guidance proposes approaches to risk characterization and uncertainty analysis, and provides recommendations for further research in this area.