Book excerpt: Mitochondrial diseases represent a complex group of genetic disorders that primarily affect the mitochondria, the energy-producing structures within our cells. These diseases can lead to a wide range of symptoms, impacting various organ systems and often presenting significant challenges for patients and their families. As our understanding of mitochondrial diseases grows, so does the recognition of the need for comprehensive care that encompasses not just medical interventions but also psychological support. This book aims to bridge the gap between the scientific understanding of mitochondrial diseases and the therapeutic benefits of Cognitive Behavioral Therapy (CBT). While medical treatments focus on managing symptoms and improving physiological function, psychological support is essential for helping patients navigate the emotional and mental health challenges that accompany chronic illness. Cognitive Behavioral Therapy has been shown to be effective in treating a variety of mental health conditions, including anxiety, depression, and stress, which can be particularly prevalent in those living with chronic diseases. This therapeutic approach empowers individuals by fostering self-awareness, developing coping strategies, and encouraging positive behavioral changes. By integrating CBT into the care of those affected by mitochondrial diseases, we can help improve not only their psychological well-being but also their overall quality of life. In the chapters that follow, we will explore a range of topics related to mitochondrial diseases, genetics, and the principles of CBT. We will discuss the biological underpinnings of mitochondrial dysfunction, the emotional impact of living with chronic illness, and the various CBT tools and techniques that can support mental health. Additionally, we will address practical strategies for managing pain, dealing with trauma, and navigating the often overwhelming journey of genetic conditions. This book is intended for patients, families, healthcare providers, and anyone interested in understanding the interplay between mitochondrial diseases and psychological well-being. It is my hope that the information and strategies presented here will offer guidance, comfort, and encouragement to those affected by these complex disorders. Together, we can foster a more holistic approach to care that recognizes the importance of mental health alongside physical health. Welcome to this journey of understanding, healing, and empowerment.