 Patients and Methods: The study will be conducted on 2 groups. Group 1 will include 1025 primary school children recruited from 2 urban schools in Cairo with age ranging between 6 and 12. Anthropometric measures and prevalence of overweightobesity will be assessed. Group 2 will include 100 obese children according to the CDC definition and 50 age and sex matched children with normal weight. All will be subjected to history taking, anthropometric measures, complete blood picture, iron profile and soluble transferrin receptor. Weight reduction program for 6 months will be done for obese children and all parameters will be re-ckecked. 