Loneliness, Food Practices, and Ageing: The Inclusion of Qualitative Evidence in Health Promotion Programmes

<b>Background/Objectives</b>: Social sciences have described the 21st century as the 'era of loneliness', a time marked by the subjective and often distressing experience of lacking meaningful social connections. While loneliness has been linked to poorer health outcomes, its relationship with dietary practices remains underexplored. <b>Methods</b>: This ethnographic study examines the impact of loneliness on the eating habits of older adults, based on fieldwork conducted in Galicia and Extremadura (Spain) between November 2024 and April 2025. Using semi-structured interviews (<i>n</i> = 25) and participant observation in domestic settings, we examined everyday food practices. Data were examined using thematic analysis. <b>Results</b>: Participants acknowledged the connection between diet and health, although their dietary practices often failed to meet nutritional recommendations. Loneliness and social isolation influenced food choices and cooking routines, often leading to less nutritious diets. These effects were shaped by gender and social class. Many participants associated the decline of shared meals and food-related sociability with a diminished quality of life. The absence of a meaningful companion was experienced as a profound loss, prompting various coping strategies. <b>Conclusions</b>: The findings highlight that food holds both nutritional and symbolic value. Health promotion strategies should address the social and emotional dimensions of eating. Loneliness disrupts food practices at multiple levels, calling for public health responses that integrate biological, cultural, and care perspectives.