The Opportunity of Adolescence: The Health Sector Contribution is an evidence-based informational resource that identifies opportunities for growth where the health sector could, on its own and in collaboration with other sectors, contribute to healthy adolescent development. The paper focuses on healthy adolescent development and the need to invest in Canada's youth and work directly with young people to improve their health. It is hoped that this paper will be a valuable contribution to discussions occurring within organizations, between sectors and in the broader stakeholder community and will assist in developing strategies to improve the health outcomes for adolescents