Aim-To assess the knowledge regarding meaning of supplementary food among mothers of infants regarding principles of supplementary food among mothers of infants and regarding cost effectiveness of the home preparation of supplementary food among mothers of infants. Materials and Methods-The study will be conducted at selected urban slums of Navi Mumbai among mothers of infants,the urban slums are shirvane,belapur and Nerui phase i and ii.300 mothers of infants werAbstract Aim: To assess the knowledge regarding meaning of supplementary food among mothers of infants; regarding importance of supplementary food among mothers of infants; regarding principles of supplementary food among mothers of infants, and regarding cost effectiveness of the home preparation of supplementary food among mothers of infants. Materials and Methods: The study will be conducted at selected urban slums of Navi Mumbai among mothers of infants. The urban slums are shiravone, belapur, nerul phase I& II. 300 Mothers of infants were included in the study. Results: In the present study, we observed that out of 292 subjects who were mothers of infants at urban area, maximum 52% of mothers were in the age group of 25-29 and 31% and 14% are in the age group of 20-24 and 30-34 respectively. Among education of mothers of infants at urban area, 38.4% of the mothers were completed her secondary school education, 15% of mothers were illiterate, 28.4% and 18.2% were completed her primary school and higher secondary respectively. Out of 292 subjects, 44 % families had 5000-10000 income per month, 31.8% families have 10000-15000 income per month, less than 5000 income only in 11.6% families and only 9.6 % of families have more the 15000 income per month. Most of the families are nuclear families 55.1% and 32.2% families were joint families. Out of 292 samples only 183 (62.7%) of father were private employee and only 3e included in the study. Results -In the present study we observed that out of 292 subjects