David Arthur Stephen Tredinnick (born 19 January 1950) is a British Conservative former Member of Parliament who represented Bosworth in Leicestershire from 1987 to 2019.

[10] In January 2013 he was co-opted into the Science and Technology Select Committee[11][12] after Caroline Dinenage stepped down and there were no other nominations from the Conservative party.

[16] In October 2009, he told Parliament that blood does not clot under a full moon; a spokesperson for the Royal College of Surgeons of England warned that his colleagues would "laugh their heads off" at the suggestion.

[20][21] Although Sally Davies, the Chief Medical Officer (CMO), had described homeopathy as "rubbish", it was reported in May 2014 that health secretary Jeremy Hunt, at Tredinnick's urging, had requested a review of three studies by the French company, Boiron.

[22] Tredinnick told The Independent in June 2015 that homeopathy's common rejection was the result of "vested interests trying to protect their own turf".

He recommended that Ayurveda, yoga, naturopathy, homeopathy, osteopathy and chiropractic be considered in "a new health paradigm" for the NHS.

Tredinnick made reference to the Indian Ministry of Ayurveda, Yoga & Naturopathy, Unani, Siddha, Sowa Rigpa and Homoeopathy established by Hindu nationalist Prime Minister of India Narendra Modi in 2014, India's "sustainable health ministry" and its "4,000-year-old medical system plus the world’s greatest usage of homeopathy", and China's "traditional 4,000-year-old herbal medicine system and acupuncture", claiming that "one third of the world’s population already has sustainable healthcare".

[27] In 2014 he told MPs: "I am absolutely convinced that those who look at the map of the sky for the day that they were born and receive some professional guidance will find out a lot about themselves and it will make their lives easier".

[29] Liberal Democrat Michael Mullaney, who stood against him at the 2015 general election, was concerned about his "utterly ridiculous obsession with astrology" asking: "Will Mr Tredinnick ever stop?

[17] During the 2010 United Kingdom general election, he was opposed by New Scientist journalist Michael Brooks who objected to "Tredinnick's outspoken promotion of alternative medicine.

[32] Nature's Adam Rutherford described Tredinnick as "misinformed about a great many things" and said that "giving [him] influence on medical policy...is a bad move.

Andy McSmith in The Independent cited Tredinnick's view that homeopathy could cure HIV, tuberculosis, malaria, urinary infections, diarrhoea, skin eruptions, diabetes, epilepsy, eye infections, intestinal parasites, cancer, and gangrene among other conditions, and quoted Imran Khan, former head of the Campaign for Science and Engineering, as saying that "someone with such incredibly odd views is not helpful.

[37] In 2006, Tredinnick claimed for astrology software and tuition, saying it was for a debate on alternative medicine, and had been cleared with the Commons fees office.