The book "On the Mechanism of Physiological Action of Detergents" written by John Bruce McCallum presents research in the field of physiology and medicine. The author describes in detail the processes that occur in the body when taking cleaning agents, in particular cathartic drugs. The book contains the results of scientific observations and experiments, revealing the principles by which these agents affect the digestive organs and the removal of toxins from the body. Through this study, the reader will gain a deep understanding of how cathartic drugs work in our body and how their use can contribute to maintaining the health and cleanliness of the internal organs.