Prof. Mai Mahmoud Youssef is a Professor and Researcher of Child Health, at the National Research Center in Cairo, Egypt. She got the PhD in Child Studies, June 1987 from, Ain Shams University in Cairo. She has got the Master Degree of Paediatrics (M.Sc.) from Cairo University in Egypt. She was graduated and got the MBBCh, from the Faculty of Medicine, Cairo University, in Egypt; in Dec 1976. She has 25 publications and attended some conferences in the field of child health, body composition, obesity and clinical nutrition.