The work analyzes excessive bodily fat, examining its physiological and chemical composition, proposed causes, and associated health problems such as reduced fertility, respiratory and circulatory impairment, hepatic and skin disorders, and hernias. It develops a treatment system grounded in chemical reasoning and clinical observation, recommending dietary selection to avoid fat-forming elements, moderation of beverages, increased muscular activity, and specific agents such as acids, iodine, and alkalis to encourage fat disappearance without harming other tissues. Numerous case studies and practical guidance illustrate methods, typical results, and complications, and chapters discuss measurement, experimental feeding, and the role of exercise and metabolism.