Background: The overall objective is to “Assess the serum iron level in moderate & severe undernourished children (1-5 years)” in Rohilkhand Medical College & Hospital, Bareilly. Materials and Methods: The nutritional status of the children was assessed by plotting the weight and height of the children on WHO 2006 Growth Standards growth charts. Weight for age and height for age assessment was done by plotting the study subject’s weight and height on different growth charts for boys and girls. Nutritional status as per BMI for age criteria was also assessed by plotting the study subject’s BMI for their respective age