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Microplastics in food commodities

A food safety review on human exposure through dietary sources











Last updated 12/04/2024, see Corrigendum


Garrido Gamarro, E. & Costanzo, V. 2022. Microplastics in food commodities – A food safety review on human exposure through dietary sourcesFood Safety and Quality Series No. 18. Rome, FAO. 



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    With a food safety focus, a scientific literature review was conducted to characterize the current understanding about the effects of microplastics on the gut microbiome and potential health implications. The main aspects analysed are (1) the effects of microplastics on the composition, diversity and function of gut microbiome using in vito and in vivo models; (2) health implications resulting from the microplastic–microbiome interactions and underlying mechanisms; (3) the establishment of causality; and (4) influence of the gut microbiome on microplastic biodegradation. The research was also scoped to identify current gaps, limitations and needs for the eventual consideration of microbiome-related data in chemical risk assessment. With this work, ESF contributes to the FAO global programme on the impact of food systems on NCDs and obesity, by understanding the potential health implications of gut microbiome–microplastic interactions. The outcomes will provide information which can be used to improve food safety policies.
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    Human dietary exposure to chemicals in sub-Saharan Africa: safety assessment through a total diet study 2020
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    Background Human dietary exposure to chemicals can result in a wide range of adverse health effects. Some substances might cause non-communicable diseases, including cancer and coronary heart diseases, and could be nephrotoxic. Food is the main human exposure route for many chemicals. We aimed to assess human dietary exposure to a wide range of food chemicals. Methods We did a total diet study in Benin, Cameroon, Mali, and Nigeria. We assessed 4020 representative samples of foods, prepared as consumed, which covered more than 90% of the diet of 7291 households from eight study centres. By combining representative dietary surveys of countries with findings for concentrations of 872 chemicals in foods, we characterised human dietary exposure. Findings Exposure to lead could result in increases in adult blood pressure up to 2·0 mm Hg, whereas children might lose 8·8–13·3 IQ points (95th percentile in Kano, Nigeria). Morbidity factors caused by coexposure to aflatoxin B1 and hepatitis B virus, and sterigmatocystin and fumonisins, suggest several thousands of additional liver cancer cases per year, and a substantial contribution to the burden of chronic malnutrition in childhood. Exposure to 13 polycyclic aromatic hydrocarbons from consumption of smoked fish and edible oils exceeded levels associated with possible carcinogenicity and genotoxicity health concerns in all study centres. Exposure to aluminium, ochratoxin A, and citrinin indicated a public health concern about nephropathies. From 470 pesticides tested across the four countries, only high concentrations of chlorpyrifos in smoked fish (unauthorised practice identified in Mali) could pose a human health risk. Interpretation Risks characterised by this total diet study underscore specific priorities in terms of food safety management in sub-Saharan Africa. Similar investigations specifically targeting children are crucially needed.
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    Multicriteria-Based Ranking for Risk Management of Food-Borne Parasites. Microbiological Risk Assessment Series (MRA) 23 2014
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    Infectious diseases caused by food-borne parasites have not received the same level of attention as other food-borne biological and chemical hazards. Nevertheless, they cause a high burden of disease in humans, may have prolonged, severe, and sometimes fatal outcomes, and result in considerable hardship in terms of food safety, security, quality of life, and negative impacts on livelihoods. The transmission routes for food-borne parasites are diverse. They can be transmitted by ingesting fresh o r processed foods that have been contaminated via the environment, by animals or people. Additionally, notification to public health authorities is not compulsory for most parasitic diseases, so official reports do not capture the true prevalence or incidence of the diseases, as much underreporting occurs. This report presents the results of a global ranking of food-borne parasites from a food safety perspective. It also provides an overview of the current status of knowledge of the ranked paras ites in food and their public health and trade impact, and provides advice and guidance on the parasite-commodity combinations of particular concern, the issues that need to be addressed by risk managers, and the risk management options available to them. It documents the ranking process used to facilitate its adoption at regional, national, or local levels. This volume and others in this Microbiological Risk Assessment Series contain information that is useful to both risk assessors and risk ma nagers, the Codex Alimentarius Commission, governments and regulatory agencies, food producers and processers and other institutions or individuals with an interest in foodborne parasites and their impact on food safety, public health and livelihoods.

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