GAO 2001: United States General Accounting Office. Report to Chairman, Special Committee on Agin, U.S. Senate. Health Products for Seniors: "Anti-Aging" Products Pose Potential for Physical and Economic Harm. September 2001. GAO-01-1129. [Consulted 2012 December 08] Available from: http://www.gao.gov/new.items/d011129.pdf