This research questions the prevention and health promotion practices developed for young people, in France, and re-examines the nature of competences enlisted in the classical model of empowerment in health education. Moving away from the epidemiological postulate of evidence based medicine (EBM), it explores another approach of these educational practices. The research uses the perspective of narrative mediation; it tries also to identify issues about a better knowledge of oneself, making more comprehensive the issues of young students’ health.