This book is meant to draw attention to nutrition & its repercussions on the human body. Its content is intended to enable anyone, even those with no medical knowledge, to keep their state of health in check. It is a practical manual that affords us the possibility of understanding what goes on within our bodies. These notes were compiled after thirty years of medical practice & twenty years of observation & study of the human body & its reactions to the ingestion of some specific foods. A distinguishing feature of the method is its simplicity, which renders it accessible to all. It allows one to learn how to "listen" to their own body's signals, to identify the effect that food may have on different persons & to determine the most suitable lifestyle for each person. Starting from the beginning of the 20th century, revolutionary discoveries were made in the fields of genetics & medicine: blood groups were discovered in 1901, DNA (deoxyribonucleic acid) in 1953 by James...