Neurasthenia or Nervous Exhaustion is a book written by John Harvey Kellogg and first published in 1915. The book explores the condition of neurasthenia, which was a common diagnosis in the late 19th and early 20th centuries for a range of symptoms related to nervous exhaustion. Kellogg, a physician and health reformer, offers his insights into the causes, symptoms, and treatment of this condition, drawing on his experience as a practitioner and his...