Devi Nambudripad was a student chiropractor and acupuncturist at the time she developed NAET. Whilst experiencing a reaction to eating carrots she attempted to overcome the reaction through a self-administered acupuncture treatment. After the treatment the reaction to eating carrots did not return. At the time of the acupuncture treatment, a remnant of carrot was on her skin, and Nambudripad concluded from this that the presence of a minute quantity of carrot during the acupuncture treatment was the key to the treatment. She then formulated a hypothesis that contact with a small amount of an allergen during an acupuncture or acupressure session can remove reactions to food and other substances.