Gerson Regimen for Cancer
Gerson Regimen for Cancer: What It Is, How It May Help, and Safety
Authors
Christine has a dynamic background in the life sciences, public health, and program operations. Her career began at the lab bench with a Gates Foundation-funded HIV Vaccine research group, which led her to graduate studies in public health epidemiology at UC Berkeley. Her research experience spans clinical epidemiology research to evaluating the impacts of community nutrition programs in Los Angeles, the Central Valley, and Oakland. Most recently she has worked in executive operations for a seed-stage venture capital firm based in San Francisco. Personally, Christine is passionate about holistic health and wellness. She is a clinical herbalist and Reiki master, and she has been practicing yoga for 15+ years. She brings a breadth of experiences to her work leading the CancerChoices program.
Maria Williams is a research and communications consultant who brings over 15 years’ experience in research, consumer education, and science communication to CancerChoices. She has worked primarily in public health and environmental health.
Clinical reviewer
Laura Pole is senior clinical consultant for CancerChoices. Laura is an oncology clinical nurse specialist who has been providing integrative oncology clinical care, navigation, consultation, and education services for over 40 years. She is the co-creator and co-coordinator of the Integrative Oncology Navigation Training at Smith Center for Healing and the Arts in Washington, DC. Laura also manages the “Media Watch Cancer News That You Can Use” listserv for Smith Center/Commonweal. In her role as a palliative care educator and consultant, Laura has served as statewide Respecting Choices Faculty for the Virginia POST (Physician Orders for Scope of Treatment) Collaborative as well as provided statewide professional education on palliative and end-of-life care for the Virginia Association for Hospices and Palliative Care.
For CancerChoices, Laura curates content and research, networks with clinical and organizational partners, brings awareness and education of integrative oncology at professional and patient conferences and programs, and translates research into information relevant to the patient experience as well as clinical practice.
Laura sees her work with CancerChoices as a perfect alignment of all her passions, knowledge and skills in integrative oncology care. She is honored to serve you.
Last update: April 23, 2026
Author of previous version: Nancy Hepp, MS
Gerson regimen for cancer: what you need to know
- The Gerson regimen is a diet-based therapy targeting cancer cell metabolism; it includes a specific diet, supplements, and coffee enemas.
- There are few clinical studies investigating the Gerson regimen for cancer care, and many expert reviews conclude the Gerson regimen lacks any substantive evidence as an effective cancer treatment.
- The American Cancer Society considers the Gerson Regimen to be unsafe.
- Serious and even life-threatening side effects have been reported among people following the Gerson regimen.
- This is not a standalone treatment for cancer.
What is the Gerson regimen?
The Gerson regimen, developed by Max Gerson, MD in the 1940s and ‘50s, is based on the theory that cancer is caused by alteration of cell metabolism by toxic environmental substances and processed food. It emphasizes increasing potassium intake and minimizing sodium consumption in an effort to correct electrolyte imbalances, repair tissue, and detoxify the liver. The Gerson regimen involves consuming juices from fresh, raw fruit and vegetables; eliminating salt from the diet; taking supplements such as potassium, vitamin B12, thyroid hormone, and pancreatic enzymes; and detoxifying the liver with coffee enemas to stimulate metabolism.1Cassileth B. Gerson regimen. Oncology (Williston Park). 2010 Feb;24(2):201.
There are few studies investigating the effectiveness of the Gerson regimen for treating cancer, and the results are not conclusive. As early as 1973, the American Cancer Society discouraged use of the regimen: “After study of the literature and other available information, the American Cancer Society has found no evidence that the Gerson Method results in objective benefit in the treatment of cancer in human beings. Lacking such evidence, the American Cancer Society strongly urges individuals with cancer not to seek treatment with the Gerson Method.”2Unproven methods of cancer management. Gerson method of treatment for cancer. CA: A Cancer Journal for Clinicians. 1973 Sep-Oct;23(5):314-7. A 2015 review by the National Cancer Institute states: “No conclusions about the effectiveness of the Gerson therapy, either as an adjuvant to other cancer therapies or as a cure, can be drawn from any of the studies reported.”3PDQ® Integrative, Alternative, and Complementary Therapies Editorial Board. PDQ Gerson Therapy. National Cancer Institute. April 11, 2015. Viewed April 13, 2026. The most recent published study on the regimen is from 2014. The FDA prohibits marketing the Gerson regimen in the United States.
We strongly caution against the use of the Gerson regimen for cancer care. In addition to extremely limited evidence about its effectiveness, there are serious safety concerns, including the potential for nutritional deficits, infections, or coma. Cases of death have been reported. Be sure to discuss any dietary modifications with your oncology team. For general dietary guidelines for people with cancer and a discussion of popular “anticancer” diets, see our page Eating Well ›
Safety
- Serious safety concerns including coma and sepsis
- As it is originally published, this is a complex regimen that is difficult to study in clinical trials; some administrations of the regimen include potentially dangerous interventions that are not evidence based or approved by the FDA
How the Gerson regimen may help people with cancer
Strength of evidence rating
We rate the strength of the evidence with 0=no evidence, 1=weak evidence, 2=modest evidence, and 3=good evidence. Read more about our method in detail here ›
Improving treatment outcomes
See MoreIn a case review of 6 patients, people with metastatic cancer treated with the Gerson regimen, in most cases along with a conventional or complementary therapy, showed better survival. However, the authors state that “the data are inconclusive at times because of confounding variables” and that “a case study cannot and should not be conclusive of the effect of a treatment.”4Molassiotis A, Peat P. Surviving against all odds: analysis of 6 case studies of patients with cancer who followed the Gerson therapy. Integrative Cancer Therapies. 2007 Mar;6(1):80-8.
In a mid-sized observational study comparing people with melanoma treated with the Gerson regimen to published accounts of people with similar cancer stages treated in other facilities, those treated with the Gerson regimen showed better survival.5Hildenbrand GL, Hildenbrand LC, Bradford K, Cavin SW. Five-year survival rates of melanoma patients treated by diet therapy after the manner of Gerson: a retrospective review. Alternative Therapies in Health and Medicine. 1995 Sep;1(4):29-37. However, another study critiqued the study design, stating “no conclusion regarding the efficacy of the regimen is possible.”6Huebner J, Marienfeld S et al. Counseling patients on cancer diets: a review of the literature and recommendations for clinical practice. Anticancer Research. 2014 Jan;34(1):39-48.
Managing side effects
See MoreWe did not find any research investigating the Gerson regimen for managing side effects.
Optimizing your body terrain
We did not find any research investigating the Gerson regimen for body terrain factors.
Reducing cancer risk or recurrence
We did not find any research investigating the Gerson regimen for reducing cancer risk or recurrence.
Full safety details
Side effects and adverse reactions
Serious and even life-threatening side effects have been reported among people following the Gerson regimen:7Questionable methods of cancer management: ‘nutritional’ therapies. CA: A Cancer Journal for Clinicians. 1993 Sep-Oct;43(5):309-19.
- Sepsis
- Coma due to low serum sodium
- Serious infections and deaths from electrolyte imbalance
Common side effects:8Hesse CC. Gerson Primer. Tijuana, Mexico. Curtis C. Hesse. 1982, as described in Questionable methods of cancer management: ‘nutritional’ therapies. CA: A Cancer Journal for Clinicians. 1993 Sep-Oct;43(5):309-19.
- Flu-like feelings
- Loss of appetite
- Perspiration with strong odor
- Weakness
- Dizziness
- Cold sores
- Fever blisters
- Nutritional imbalances9Block K, Gyllenhaal C. Chapter 6: Nutritional Interventions in Cancer. In Abrams, DI, Weil, AT. Integrative Oncology. 2nd Edition. New York, NY: Oxford University Press. 2014. p. 144; McKinney N. Naturopathic Oncology, 3rd Edition. Victoria, BC, Canada: Liaison Press. 2016. p. 110.
Drug interactions
There are no known drug interactions with this therapy.
FAQs
- Can the Gerson regimen help fight cancer?
Research on this is very limited and inconclusive, and serious side effects have been reported among people following the Gerson regimen. We strongly caution against the use of the Gerson regimen for cancer care. - Can the Gerson regimen help with cancer side effects?
There are no studies investigating whether the Geron regimen helps with cancer side effects. - Does the Gerson regimen cause side effects?
Serious and even life-threatening side effects (sepsis, coma, infections) have been reported. Common side effects include flu-like feelings, loss of appetite, weakness, dizziness, cold sores, and fever blisters. - Does the Gerson regimen support immune function in cancer patients?
There are no studies investigating whether the Gerson regimen supports immune function. - Can the Gerson regimen reduce inflammation in cancer patients?
There are no studies investigating whether the Gerson regimen reduces inflammation.
Read more about supplements and therapies
Whole person cancer care resources
References[+]
| 1 | Cassileth B. Gerson regimen. Oncology (Williston Park). 2010 Feb;24(2):201. |
|---|---|
| 2 | Unproven methods of cancer management. Gerson method of treatment for cancer. CA: A Cancer Journal for Clinicians. 1973 Sep-Oct;23(5):314-7. |
| 3 | PDQ® Integrative, Alternative, and Complementary Therapies Editorial Board. PDQ Gerson Therapy. National Cancer Institute. April 11, 2015. Viewed April 13, 2026. |
| 4 | Molassiotis A, Peat P. Surviving against all odds: analysis of 6 case studies of patients with cancer who followed the Gerson therapy. Integrative Cancer Therapies. 2007 Mar;6(1):80-8. |
| 5 | Hildenbrand GL, Hildenbrand LC, Bradford K, Cavin SW. Five-year survival rates of melanoma patients treated by diet therapy after the manner of Gerson: a retrospective review. Alternative Therapies in Health and Medicine. 1995 Sep;1(4):29-37. |
| 6 | Huebner J, Marienfeld S et al. Counseling patients on cancer diets: a review of the literature and recommendations for clinical practice. Anticancer Research. 2014 Jan;34(1):39-48. |
| 7 | Questionable methods of cancer management: ‘nutritional’ therapies. CA: A Cancer Journal for Clinicians. 1993 Sep-Oct;43(5):309-19. |
| 8 | Hesse CC. Gerson Primer. Tijuana, Mexico. Curtis C. Hesse. 1982, as described in Questionable methods of cancer management: ‘nutritional’ therapies. CA: A Cancer Journal for Clinicians. 1993 Sep-Oct;43(5):309-19. |
| 9 | Block K, Gyllenhaal C. Chapter 6: Nutritional Interventions in Cancer. In Abrams, DI, Weil, AT. Integrative Oncology. 2nd Edition. New York, NY: Oxford University Press. 2014. p. 144; McKinney N. Naturopathic Oncology, 3rd Edition. Victoria, BC, Canada: Liaison Press. 2016. p. 110. |