Editing Metabolic typing (section)

== Background ==

Metabolic typing was introduced by [[William Donald Kelley]], a [[dentist]], in the 1960s. Kelley advocated basing dietary choices on the activity of one's [[sympathetic nervous system|sympathetic]] and [[parasympathetic nervous system]]s. In 1970, Kelley was convicted of practicing medicine without a license, as he had diagnosed a patient with [[lung cancer]] based on a fingerstick [[blood test]] and prescribed nutritional therapy. He continued to promote a metabolic typing diet through the 1980s.<ref name="qw1">{{cite web | url = http://www.quackwatch.org/01QuackeryRelatedTopics/cancer.html | title = Questionable Cancer Therapies: Kelley/Gonzalez Metabolic Therapy | date=27 July 2010|accessdate =3 September 2013| author=Stephen Barrett, M.D.|publisher = [[Quackwatch]]}}</ref> The practice has been further developed by others including Harold J. Kristal and William Wolcott.