From "Forever Strong" by Dr. Gabrielle Lyon, which introduces her philosophy of Muscle-Centric Medicine® and the Lyon Protocol. The core argument is that muscle health is the organ of longevity and critical for overall health, metabolic function, and defense against diseases like dementia and cancer. Dr. Lyon critiques mainstream nutritional guidelines, particularly the low recommended dietary allowance for protein, advocating instead for a protein-forward, strength-training-focused lifestyle with a high intake of bioavailable animal-based proteins. The book includes personal anecdotes, case studies, specific dietary plans with high protein targets (like 1 gram per pound of ideal body weight), detailed exercise routines focusing on resistance training, and advice on mindset and tracking health metrics to achieve lasting wellness.