You can help expand this article with text translated from the corresponding article in Italian. (October 2024) Click [show] for important translation instructions. View a machine-translated version of the Italian article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Italian Wikipedia article at [[:it:Metodo Simoncini]]; see its history for attribution. You may also add the template {{Translated|it|Metodo Simoncini}} to the talk page. For more guidance, see Wikipedia:Translation.

Tullio Simoncini (born 1951 died 20 May 2024) is a former Italian physician known for alternative medicine advocacy. He is known for the claim that cancer is caused by the fungus Candida albicans, and has argued that cancer is a form of candida overgrowth. He also is known for claims that cancer can be cured with intravenous sodium bicarbonate.^[1][2] 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.^[3]

The mainstream medical community rejects Simoncini's hypothesis, citing a lack of peer-reviewed studies that support it.^[4] The American Association for Cancer Research has recently written that research shows an association between fungi, including Candida, and cancer but has not determined causation.^[5] The site does not endorse any cures, including treatment with sodium bicarbonate.

Quackwatch lists sodium bicarbonate injections as a "dubious treatment".^[6]

Simoncini was tried and found guilty of fraud and manslaughter in 2006 after a patient died after receiving his treatment.^[7]

In 2018, Simoncini received a 5-year jail sentence for culpable manslaughter of a cancer patient in 2011.^[8]

In 2012, Simoncini became involved in a 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".^[9]

• List of ineffective cancer treatments