Making use of Bourdieu's threefold conceptualisation of cultural capital, this paper examines and disentangles the association between social origins and children's food consumption. The aim of the work is twofold. Using data from the Multipurpose survey on daily life conducted by Istat (2009–2012), we first show that children's compliance with dietary advice is indeed influenced by their social origins, but more so in terms of familial cultural resources than economic ones. All types of cultural capital enhance the quality of children's nutrition. Second, we concentrate on the role of the school canteen as a child‐centred investment strategy intended to reduce health inequalities by providing a wholesome lunch for all children. Although the school meal effectively improves the degree of dietary compliance, the results indicate that this public service is less often used by children from lower social origins. Moreover, we do not find any equalising effect of the school meal on the diets of disadvantaged children. These findings are discussed in light of future research on sociology of health stratification and health promotion programmes.