Maria Buchinger (* 21 May 1916 in Flensburg, Germany; † 12 March 2010 in Marbella, Spain)[1] was a German proponent of therapeutic fasting. Buchinger was a personal assistant to her father, Otto Buchinger, a doctor who researched therapeutic fasting. Together with her husband, Helmut Wilhelmi, Buchinger opened fasting clinics in Überlingen, Germany and Marbella, Spain.