In Côte d'Ivoire, Tambruya, a traditional practice of supporting nursing mothers among the Ebrié ethnic groups, illustrates the persistence of local knowledge that differs from biomedical recommendations. In Yopougon, a cosmopolitan district of Abidjan, there are multiple representations of postnatal nutrition, where ancestral traditions and modern medicine intersect. The objective of this research is to understand the mechanisms by which ethnicity structures nursing mothers’ conceptions of ‘’eating well’’ and dietary practices. The qualitative research was conducted in four villages with 40 nursing mothers (20 Ebrié and 20 non-Ebrié) with children under six months of age. This research uses two data collection techniques, namely 20 semi-structured interviews and four focus groups conducted in November 2010. The data were subjected to a comparative thematic content analysis focusing on conceptions of “eating well” and dietary practices. The results of the research reveal that Ebrié wet nurses prioritize satiety, body accumulation, and therapeutic benefits, with a specialized diet (attiéké, foutou), intensified feeding rhythms (every 30-45 minutes), and the use of traditional appetite stimulants. On the other hand, wet nurses from other ethnic groups emphasize balance, diversification, and moderation, gradually incorporating biomedical recommendations. On the other hand, nursing mothers from other ethnic groups value balance, diversification, and moderation, gradually integrating biomedical recommendations. The results highlight that convergences nevertheless emerge around seasonal adaptations and temporary prescriptions, revealing a shared habitus that transcends the different ethnic groups. This research calls for the development of ways of dialogue between biomedical knowledge and traditional knowledge, with a view to co-constructing health interventions.