Balanced nutrition during breastfeeding is important for breastfeeding mothers because it affects breastmilk production. The fulfillment of good nutrition for breastfeeding mothers will affect the nutritional status and the growth of their babies. The concept of sick and healthy, food and drink that is good for health, trust and abstinence, on one hand, can be a barrier for health development but on the other one can be a potential for overcoming health problems. This study is a secondary data analysis, which is sourced from Health Ethnographic Research data in 2012, 2014 and 2015. Samples taken were from the Rote, Sabu and Madura ethnic groups. Data collected included breastfeeding mothers' behavior as well as the adequacy of nutrition for breastfeeding mothers in the three ethnic groups. The results showed that maternal behavior in newborns gave a prelactal type of food, where in the ethnic Rote in the form of coffee water or sugar water, in the ethnic Sabu in the form of a concoction of chili leaves that were pounded, filtered and taken the juice, and the Madura ethnic in the form of honey and young coconut water aimed to smoothen baby's digestion.