Tullio Simoncini (born 1951) is a convicted fraudster and former Italian physician known for alternative medicine advocacy. He is known for the false claim that cancer is caused by the fungus Candida albicans, and has argued that cancer is a form of candida overgrowth. He also made the false claim that cancer can be cured with injections of sodium bicarbonate. On his website, Simoncini says that he was formerly an oncologist but that designation has been challenged by the medical community because of his use of sodium bicarbonate in the treatment of cancer.
Simoncini was tried and found guilty of fraud and manslaughter in 2006 after a patient died after receiving his treatment.
In 2018, Simoncini received a 5-year jail sentence for culpable manslaughter of a cancer patient in 2011.
In 2012, Simoncini became involved in another controversy when he was invited to a conference in Totnes, England, by the Arcturus Clinic. Trading Standards then accused the clinic of violating the Cancer Act 1939 because they had published information that "offer[ed] to treat any person for cancer." Stephen Hopwood, the clinic's manager, described Simoncini's invitation as a "misunderstanding".
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