"Good Energy" by Casey Means, MD, is a book focusing on metabolic health as the key to overall well-being. It argues that many chronic diseases stem from cellular energy dysfunction, caused by a mismatch between our evolved biology and the modern environment. The book explores how factors like diet, toxins, and stress impact mitochondrial function and lead to "Bad Energy," resulting in chronic inflammation and disease. It provides actionable steps to improve metabolic health through lifestyle changes, dietary adjustments, and awareness of environmental toxins. Means advocates for a proactive approach to health, emphasizing personalized strategies and encourages readers to question conventional medical practices regarding chronic illnesses.