Tags: Medician.
Hugh Desiax Riordan M.D. (May 7 1932 – January 7 2005) was an American psychiatrist and researcher. He was the co-founder and until his death the director of the Olive W. Garvey Center for the Improvement of Human Functioning (now called the Riordan Clinic). He was best known for his theory that nutrition and vitamins are effective treatments for diseases such as cancer.