Chemotherapy only results in substantial remission rates for 3 per cent of cancers. Even when it works, you could be trading one type of cancer for a more deadly one later, as chemo has been proved to cause many forms of cancer after a few years. If given solely to improve the time you have left, the side effects of chemo may destroy your quality of life.

In most cancers, combination chemotherapy drugs are no more effective than single ones. For many early stage cancers of the breast, colon or rectum, surgery has been shown to be adequate in staving off the disease.Both the Gonzalez and Kingsley programmes have some evidence of a promising success rate. However dietary programmes like the Gerson therapy should not be regarded as a cure all for late stage disease and may not work on their own, particularly as many patients attempt the treatment as a last ditch effort, after they have tried everything else and been weakened by radiation and chemotherapy. Evidence suggests that diet and detoxification is only one strand of treatment. Some means of killing cancer cells whether with vitamin C, oxygen therapy or pancreatic enzymes many also be necessary. Dr Gonzalez maintains that his treatment works better when used as a true alternative, not as an adjunct to orthodox treatment or only approached at a late stage, after chemo has failed.