Tredinnick's views have attracted criticism. During the 2010 United Kingdom general election, he was opposed by "New Scientist" journalist Dr. Michael Brooks who objected to "Tredinnick's outspoken promotion of alternative medicine." During a hustings debate called by Brooks to "highlight the scientific literacy of the UK's elected representatives", Brooks said that Tredinnick regarded homeopathy as a suitable treatment for malaria and HIV, which Tredinnick did not deny. In March 2013, Tredinnick's opinions were described as "nonsensical" by the government's outgoing chief scientist, Sir John Beddington, who said the MP had fallen for the "Galileo fallacy" ("Galileo was laughed at but was right; therefore since I am laughed at I must be right").