This book was written from an interdisciplinary perspective with the aim of understanding the transformation of the contemporary health paradigm. Today, the rise in chronic diseases, individuals’ holistic pursuit of quality of life, and the evident limitations of modern medicine have increased interest in functional and complementary health approaches. In this context, the book comprehensively addresses functional medicine and complementary and alternative medicine practices, which are becoming increasingly important at both clinical and societal levels.

The chapters in the book have been prepared by experts recognized for their academic and clinical contributions to the health sciences. They contain scientific, up-to-date, and practical information. Beginning with the basic principles of the functional approach, the content offers a multidimensional perspective on health ranging from traditional medicine to substance use, mental health to environmental toxins. Each chapter addresses health issues through a lens that focuses not only on symptoms but also on the biopsychosocial structure of the individual. This work serves as a foundational resource for undergraduate and graduate students in fields such as medicine, nursing, nutrition and dietetics, physical therapy, pharmacy, psychology, and public health. It also provides an academic reference for healthcare professionals, researchers, and readers interested in alternative health models.

The book’s aim is not merely to provide theoretical knowledge but to present a holistic approach to health that can inform practice in light of current scientific data. In this regard, the work seeks to contribute to the development of a comprehensive health vision by bridging the gap between conventional medicine and alternative systems.