This document provides an overview of key concepts and principles of health education. It discusses health determinants and factors that influence health, such as social, economic, environmental and behavioral elements. It also outlines three levels of disease prevention - primary, secondary and tertiary prevention. Additionally, it describes philosophies that can be applied to health education, including behavioral change, cognitive-based, decision-making, freeing/functioning, social change and eclectic philosophies. Each philosophy aims to promote better health and well-being through different approaches.