What are the functions of mitochondria in the human body? Why might they stop working properly and what can happen as a result? How can personalized nutrition help to optimize mitochondrial function and prevent or address chronic conditions? This innovative book explores the incredibly complex biochemical roles of mitochondria in health and disease. When healthy, mitochondria provide us with ninety percent of our body's energy. When unhealthy, this can lead to many chronic and degenerative conditions including cancer and Alzheimer's disease. This guide helps practitioners to identify the mitochondrial dysfunction underlying a wide range of health complaints, and provides inspiration about relevant and emerging mitochondria-supportive dietary regimes and nutrients to explore within the model of personalized nutrition.