Neurasthenia Or Nervous Exhaustion is a book written by John Harvey Kellogg in 1915. The book is a comprehensive guide to the causes and treatment of neurasthenia, a condition that was commonly diagnosed in the late 19th and early 20th centuries. The author, a renowned physician and health advocate, describes the symptoms of neurasthenia, which include fatigue, irritability, insomnia, and depression. Kellogg also explores the various factors that...