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What Is the Gerson Therapy?
The Gerson therapy has been used by some people to treat cancer and other diseases. It is based on the role of minerals, enzymes and other dietary factors. There are three key parts to the therapy:
· Diet. Organic fruits, vegetables and whole grains to give the body plenty of vitamins, minerals, enzymes and other nutrients. The fruits and vegetables are low in sodium (salt) and high in potassium.
· Supplementation. The addition of certain substances to the diet to help correct cell metabolism (the chemical changes that take place in a cell to make energy and basic materials needed for the body's life processes).
· Detoxification. Treatments, including enemas, to remove toxic (harmful) substances from the body.
What Is the History of the Discovery and Use of the Gerson Therapy as a Complementary or Alternative Treatment for Cancer?
What Is the Theory Behind the Claim That the Gerson Therapy Is Useful in Treating Cancer?
The Gerson therapy is based on the idea that cancer develops when there are changes in cell metabolism because of the buildup of toxic substances in the body. Dr. Gerson said the disease process makes more toxins and the liver becomes overworked. According to Dr. Gerson, people with cancer also have too much sodium and too little potassium in the cells in their bodies, which causes tissue damage and weakened organs.
The goal of the Gerson therapy is to restore the body to health by repairing the liver and returning the metabolism to its normal state. According to Dr. Gerson, this can be done by removing toxins from the body and building up the immune system with diet and supplements. The enemas are said to widen the bile ducts of the liver so toxins can be released. According to Dr. Gerson, the liver is further overworked as the treatment regimen breaks down cancer cells and rids the body of toxins. Pancreatic enzymes are given to decrease the demands on the weakened liver and pancreas to make enzymes for digestion. An organic diet and nutritional supplements are used to boost the immune system and support the body as the regimen cleans the body of toxins. Foods low in sodium and high in potassium are said to help correct the tissue damage caused by having too much sodium in the cells.
How Is the Gerson Therapy Administered?
The Gerson therapy requires that the many details of its treatment plan be followed exactly. Some key parts of the regimen include the following:
· Drinking 13 glasses of juice a day. The juice must be freshly made from organic fruits and vegetables and be taken once every hour.
· Eating vegetarian meals of organically grown fruits, vegetables, and whole grains.
· Taking a number of supplements, including:
o Potassium.
o Lugol's Solution (potassium iodide, iodine and water).
o Coenzyme Q10 injected with vitamin B12. (The original regimen used crude liver extract instead of coenzyme Q10.)
o Vitamins A, C and B3 (niacin).
o Flaxseed oil.
o Pancreatic enzymes.
o Pepsin (a stomach enzyme).
· Taking coffee or chamomile enemas regularly to remove toxins from the body.
· Preparing food without salt, spices or oils, and without using aluminum cookware or utensils.
Have Any Preclinical (Laboratory or Animal) Studies Been Conducted Using the Gerson Therapy?
No results of laboratory or animal studies have been published in scientific journals.
Have Any Clinical Trials (Research Studies With People) of the Gerson Therapy Been Conducted?
Most of the published information on the use of the Gerson therapy reports on retrospective studies (reviews of past cases). Dr. Gerson published case histories (detailed reports of the diagnosis, treatment and follow-up of individual patients) of 50 of his patients. He treated several different types of cancer in his practice. The reports include Dr. Gerson's notes, with some X-rays of the patients over time. The follow-up was contact with patients by mail or phone and included anecdotal reports (incomplete descriptions of the medical and treatment histories of one or more patients).
In 1947 and 1959, the National Cancer Institute, a part of the National Institutes of Health, reviewed the cases of a total of 60 patients treated by Dr. Gerson. The NCI found that the available information did not prove the regimen had benefit.
The following studies of the Gerson therapy were published:
· In 1983-1984, a retrospective study of 38 patients treated with the Gerson therapy was done. Medical records were not available to the authors of the study; information came from patient interviews. The study provided no scientific evidence.
· In 1990, a study of a diet regimen similar to the Gerson therapy was done in Austria. The patients received standard treatment along with the special diet. The authors of the study reported that the diet appeared to help patients live longer than usual and have fewer side effects. The authors said it needed further study.
· In 1995, a retrospective study of patients at the Gerson Institute was done. The patients had melanoma, colorectal and ovarian cancers. The study reported that some patients lived longer than usual for patients with these cancers.
Have Any Side Effects or Risks Been Reported From Use of the Gerson Therapy?
Reports of three deaths that may be related to coffee enemas have been published. Taking too many enemas of any kind can cause changes in normal blood chemistry, chemicals that occur naturally in the body and keep the muscles, heart and other organs working properly.
Is the Gerson Therapy Approved by the U.S. Food and Drug Administration for Use as a Cancer Treatment in the United States?
The Gerson therapy has not been approved by the FDA for use as a treatment for cancer or any other disease.
For most cancer patients, nutrition guidelines include eating a well-balanced diet with plenty of fruits, vegetables and whole-grain products. However, general guidelines such as these may have to be changed to meet the specific needs of an individual patient. Patients should talk with their health care providers about an appropriate diet to follow.