Discovered by Dr. Ian Zagon at Penn State and introduced to patients by Dr. Bernard Bihari in New York, low dose naltrexone (LDN) is a therapy that helps the body heal itself. By increasing production of endorphins, LDN restores immune system help and halts disease progression in many illnesses. In addition, because healing is promoted, LDN brings many autoimmune and cancerous conditions into remission. This book explains how the opiate antagonist naltrexone works and its applications in medicine.