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Total Diet Studies: A comprehensive tool for dietary exposure assessment

2025-09-25Documento de conferência Acesso aberto
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datacite.subject.fosCiências Agrárias::Biotecnologia Agrária e Alimentar
datacite.subject.sdg03:Saúde de Qualidade
dc.contributor.authorVasco, Elsa
dc.contributor.authorDias, Maria da Graça
dc.contributor.authorOliveira, Luísa
dc.date.accessioned2026-02-10T15:17:37Z
dc.date.available2026-02-10T15:17:37Z
dc.date.issued2025-09-25
dc.description.abstractIntroduction Total Diet Studies (TDS) are a cost-effective, scientifically robust approach recommended by the World Health Organization (WHO) to estimate long-term population exposure to dietary chemical contaminants. Unlike traditional monitoring, TDS analyses food- "as consumed," and considers the overall diet, offering realistic insights into chronic risks and supporting public health policy. Standardized methods, such as those from TDS-Exposure and EFSA/FAO/WHO, enhance data quality and cross-country comparability. Methodology The study involves two main sampling phases: planning and fieldwork, followed by chemical analysis of the TDS samples and subsequent exposure assessment and risk characterisation. During planning, key food items are selected based on national dietary data, classified using the FoodEx2 system, and organized into TDS samples. Sampling considers factors such as origin, market share, season, and cooking habits. In fieldwork, food samples are collected from retail outlets, prepared according to culinary practices, and combined into composite samples for laboratory analysis. Chemical analysis uses validated methods (e.g., ICP-MS, GC-MS, LC-MS/MS); speciation is essential for certain contaminants like arsenic and mercury. Dietary exposure is estimated by combining contamination levels with food consumption data using probabilistic models. Results can be stratified by age, gender, etc. Exposure is compared to health-based reference values (e.g., TDI, TWI) or assessed via the Margin of Exposure (MOE). Uncertainty is addressed using methods such as sensitivity analysis and Monte Carlo simulations. Results TDS provides a national overview of dietary exposure to chemical contaminants. Results typically include identification of major dietary sources of exposure (e.g., rice for arsenic, fish for mercury), demographic exposure profiles (e.g., higher intake in children due to body weight), and baseline exposure data for trend tracking and policy evaluation. Conclusions TDS are an essential tool in modern food safety. By integrating consumption and contaminant data in a realistic, whole-diet population-wide context, it supports risk assessment and evidence-based regulation. TDS are highly effective for chronic dietary exposure assessment, helping authorities prioritize risks and protect public health. Topic Relevance Amid growing concerns over food contamination, climate change, and evolving diets, TDS play a valuable role in supporting international food safety standards, informing national programs, and contributing to Sustainable Development Goals.eng
dc.identifier.urihttp://hdl.handle.net/10400.18/10884
dc.language.isoeng
dc.peerreviewedno
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectContaminants
dc.subjectTDS
dc.subjectWhole Diet
dc.subjectMonte Carlo Risk Assessment
dc.subjectFoodEx2 Classification System
dc.subjectSegurança Alimentar
dc.titleTotal Diet Studies: A comprehensive tool for dietary exposure assessmenteng
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferenceDate2025-09-25
oaire.citation.conferencePlaceFunchal, Madeira, Portugal
oaire.citation.title6th International Conference on Food Contaminants (ICFC), 25, 26 september 2025
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

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Descrição da metodologia harmonizada de Total Diet Studies, do projeto TDSExposure, para a avaliação da exposição alimentar a contaminantes químicos.
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