In the book by doctor of biological sciences Alexey Moskalev, the author presents modern scientific data about the processes of brain aging and ways to prevent them. The author explains in an accessible way how the brain is structured, what factors influence its longevity, and methods for improving cognitive abilities in old age. The book includes recommendations on diet, physical activity, and sleep to help preserve an active, healthy brain. Readers will also learn how to improve memory, avoid pathological conditions, optimize brain productivity, and cope with stress and anxiety—as well as what kind of nutrition helps the brain not to age.