Researchers across Ireland have launched the largest study of its kind on household food habits and health, aiming to generate detailed evidence on how people make everyday dietary choices and how these patterns affect long-term wellbeing.

The initiative brings together academic teams from University College Dublin, University College Cork, Ulster University and Queen's University Belfast under the Co-Centre for Sustainable Food Systems. It will involve around 1,500 households, covering approximately 5,000 participants across the island of Ireland.

The study is designed to capture real-world food behaviours under everyday pressures, including rising living costs, time constraints, family preferences and access to healthy food options. Researchers aim to build a clearer picture of how these factors influence nutrition at household level.

Participants will complete online questionnaires over a two to three-week period, providing information on shopping habits, meal planning, and dietary patterns. A voluntary component of the study will also allow participants to contribute biological samples, including finger-prick blood tests and cheek swabs, to support broader health analysis.

A key element of the research is its cross-border scope. By comparing data from both the Republic of Ireland and Northern Ireland, researchers hope to assess how different policy approaches may influence dietary outcomes. This includes areas such as school meal programmes, food subsidies, and public health nutrition initiatives.

The findings are expected to provide valuable insights for policymakers, health authorities, retailers, food producers, and organisations involved in community or institutional catering. The goal is to support more effective strategies for improving access to nutritious, affordable and sustainable food options.

From a health and safety perspective, the study also highlights the importance of preventative public health measures. Understanding dietary behaviours at scale can help identify risks linked to poor nutrition and inform interventions that reduce long-term health pressures on healthcare systems.

Researchers say the data will also help identify opportunities to support healthier lifestyles through targeted education, improved food environments and more effective policy coordination across sectors.

The project reflects growing recognition that food systems play a central role in public health outcomes, workforce wellbeing and broader societal resilience.

Explore the study’s objectives and participation details in the full announcement.