The research project investigates how young people construct cognitive authorities in health communication across formal and informal environments. It will employ case studies and qualitative methods like interviews and discourse analysis of social media to understand how authority is constructed for young people related to health issues in schools, hobbies, and online. The research has two main goals: 1) review literature on cognitive authority in health literacy and 2) examine how authority is constructed for young people through 4 case studies analyzing authority in schools, leisure activities, and online health discussions. It aims to provide insights to support health promotion among youth.