"Good Health and How We Won It, With an Account of the New Hygiene" by Upton Sinclair and Michael Williams is a scientific publication written in the early 20th century." The book discusses contemporary thoughts on health, nutrition, and hygiene while emphasizing a diet reform movement led by Horace Fletcher. The authors share their journey toward understanding health through personal experiences, scientific explorations, and experiments in nutrition. "At the start of the book, Upton Sinclair recounts his own health struggles during his college years." He expresses his desire for proactive health management rather than reactive treatment, leading to his discovery of Horace Fletcher's dietary practices focusing on chewing food thoroughly. Sinclair shares his early experiments with diet, the challenges he faced, and the gradual accumulation of knowledge through studies and consultations with health experts. This introduction sets the stage for the authors to explore the scientific foundation of nutrition and health that forms the crux of the book. (This is an automatically generated summary.)