Tullio Simoncini was expelled from the Italian order of doctors in 2003. In 2012 he was also sentenced to 3 years of prison for fraud and involuntary manslaughter after one of his patients died of cancer. In 2015 a court of Tirana, Albania sentenced him to 18 months of prison and 4 years of suspension.
Carolyn Dean had her registration certificate revoked in Ontario in 1995 because of unfit medical practice and disregard for the welfare of 36 of her patients. She did not contest the charges and was not present or represented at her hearing. Dean wrote on her website that it was an attempt by the "medical establishment" to discredit her.
Charlotte Gerson is a staunch supporter of the so-called "Gerson Therapy," a discredited cancer cure invented by her father Max Gerson. The Gersons claim that cancer is caused by "toxins" in food that create an imbalance of potassium and sodium in the body. The alleged method for "curing" this problem is an extremely low sodium-high potassium diet including lots of juiced raw and/or organic fruits and vegetables, massive amounts of vitamin supplements, and enemas of coffee, castor oil, hydrogen peroxide, or ozone. This treatment is supposed to flush out the "toxins" and "repair" the liver. Most of the "research" supporting the therapy is in the form of case studies by Max Gerson. The National Cancer Institute reviewed some of his case studies and found the method to be ineffective. Furthermore, the American Cancer Society has issued warnings that the method can be harmful and there have been reports of comas, seizures, and death resulting from extremely low sodium levels and imbalance of electrolytes in the patients undergoing the "therapy".