Written by K Krumwiede, Markus Horneber and the CAM-Cancer Consortium.
Updated February 8, 2017

Breuss Cancer Cure

Does it work?

Clinical trials

There is only one small clinical trial – involving eight cancer patients with metastatic diseases – that has investigated the “Breuss Cancer Cure”.13 The study did not use a control group. The authors reported two complete, and two partial remissions and that the patients felt better than expected during the intervention and had experienced less pain. During the trial, one patient died, and two died shortly after completion of the trial. The authors did not attribute the deaths to the intervention. It was claimed that if that trial had been designed as a conventional phase-1-study, it would produce results showing Breuss to be an effective treatment with minor toxicity for patients with advanced cancer. No further studies have been published.13 Thomar is currently looking for people who have reported success with the "Breuss Cancer Cure", in order to carry out a retrospective study.6

Case reports

Jungi stated, without presenting data, that tumors usually become smaller during a fast but after resuming the consumption of nutrition, grow more quickly.14 Pfortmueller put forward similar statements, but without providing any empirical data.15

The case reports found on the Internet,6-9 lack valid documentation.

Animal studies

Caloric restriction (undernutrition without malnutrition) delays the incidence of various types of tumours and decreases their growth.16-29 Tumours can be sensitive and resistant to dietary restriction.30 Starvation (fasting) is a form of malnutrition. It has no beneficial effects on tumor growth, but tumor growth might be stimulated during an acute fast.31-41


K Krumwiede, Markus Horneber , CAM-Cancer Consortium. Breuss Cancer Cure [online document]. http://cam-cancer.org/The-Summaries/Dietary-approaches/Breuss-Cancer-Cure. February 8, 2017.

Document history

Assessed as up to date in February 2017 by Barbara Wider
Assessed as up to date in January 2016 by Barbara Wider.
Assessed as up to date in January 2015 by Barbara Wider.
Assessed as up to date in August 2013 by Barbara Wider.
Last updated in by March 2012 by Karl Krumwiede.
Updated and revised in January 2011 by Karl Krumwiede.
Fully updated and revised in October 2009 by Karl Krumwiede and Markus Horneber.
Summary first published in November 2005, authored by Karl Krumwiede and Markus Horneber.


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