Acupuncture is an ancient method of promoting health by balancing the vital energy throughout the body. It has been in practice in various parts of Asia for over 2000 years. In the United States, Acupuncture is one of the most popular forms of alternative medicine. According to the 2002 National Health Interview Survey—the largest and most comprehensive survey of CAM use by American adults to date—an estimated 8.2 million U.S. adults had ever used acupuncture, and an estimated 2.1 million U.S. adults had used acupuncture in the previous year.