The Fasting Cure by Upton Sinclair is a pioneering health treatise advocating fasting as a natural method for detoxification, healing, and rejuvenation. Drawing from personal experience and anecdotal evidence, Sinclair details how periodic fasting helped him overcome chronic health issues, boost energy, and improve mental clarity. He explains the science behind fasting, its effects on digestion, immunity, and disease, and offers practical guidelines on preparation, duration, and breaking the fast safely. A passionate critique of modern diets and medicine, the book promotes self-healing and bodily wisdom. Though not medically endorsed today, it influenced early 20th-century wellness movements and remains a landmark in alternative health literature

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