In Key to Health, Mahatma Gandhi shares his thoughts on maintaining health through simplicity, self-discipline, natural living, and attention to the relationship between body and mind. Drawing from his own experiences and experiments with diet, hygiene, exercise, and daily habits, Gandhi presents health as part of a larger practice of self-control and responsible living. The book offers an interesting glimpse into Gandhi's philosophy of simple living and his belief that personal discipline can support a meaningful life.