This book meets this need. Starting from the physiological characteristics of middle-aged and elderly people, this book mainly introduces the nutrition and health of middle-aged and elderly people, nutrition and health care, nutrition and health preservation, nutrition and longevity, nutrition and common diseases, as well as food selection contained in each article. More importantly, the book adds content that is rarely or almost never mentioned in other books, such as novel content on the relationship between nutrition and sleep, nutrition and psychology, nutrition and exercise.