Quackwatch is overseen by Barrett, its owner, with input from advisors and help from volunteers, including a number of medical professionals.[14] In 2003, 150 scientific and technical advisors: 67 medical advisors, 12 dental advisors, 13 mental health advisors, 16 nutrition and food science advisors, 3 podiatry advisors, 8 veterinary advisors, and 33 other "scientific and technical advisors" were listed by Quackwatch.[15] Since that time, many more have volunteered, but advisor names are no longer listed.[16]