Vitalogy, or Encyclopedia of Health and Home is a health-focused reference book that provides readers with practical advice on improving their wellbeing, lifestyle, and home environment. Written by J.H. Kellogg, a well-known advocate of natural health and the founder of the Battle Creek Sanitarium, the book covers a wide range of topics related to nutrition, exercise, mental health, and home remedies. The work emphasizes the importance of a balanced diet, regular exercise, and mental relaxation. Throughout, Kellogg shares insights into disease prevention and natural treatments, using a holistic approach to health. Vitalogy is a comprehensive guide that combines scientific knowledge with popular health practices of its time, making it a valuable resource for those interested in home health care, wellness practices, and alternative medicine. The book reflects the growing 20th-century interest in self-care and preventative health.