Should Breast Cancer Patients Avoid Fermented Foods Like Yogurt?

Should breast cancer patients limit their intake of fermented foods? What about yogurt?

Hello Doctor: My mother is 68 years old.
She was diagnosed with breast cancer last August, which recurred (she had a mastectomy and chemotherapy 11 years ago).
Recent examinations show that the cancer has now spread to her bones and liver.
This year, during chemotherapy, she has been experiencing significant discomfort due to constipation.
A nurse at the hospital suggested that she could drink yogurt to aid digestion, but also mentioned that cancer patients should avoid fermented foods.
Could you please advise on better management options? Thank you, Doctor.

connie, 40~49 year old female. Ask Date: 2010/05/14

Dr. Chen Sirong reply Oncology

1.
Fermented foods refer to products made using fermentation agents, such as steamed rice cakes.

2.
Yogurt is not considered a fermented food.

3.
Yogurt is simply an acidified food.

4.
The beneficial bacteria added to yogurt are not the same as those found in fermentation agents.

For constipation, medications such as digestive aids, stool softeners, or laxatives should still be discussed with a physician.

Thank you for your letter.

Sincerely,
Chen Sih-Rong

Reply Date: 2010/05/14

More Info

Breast cancer patients often face a myriad of dietary recommendations and restrictions, which can be confusing, especially when it comes to fermented foods like yogurt. The question of whether breast cancer patients should avoid fermented foods is nuanced and requires consideration of individual health circumstances, treatment regimens, and overall dietary needs.

Firstly, it is essential to understand that fermented foods, including yogurt, can offer several health benefits. Yogurt is rich in probiotics, which are beneficial bacteria that can help maintain gut health, improve digestion, and enhance the immune system. For patients undergoing chemotherapy, like your mother, maintaining a healthy gut flora is crucial, as chemotherapy can disrupt the balance of bacteria in the gut and lead to issues such as constipation, which your mother is experiencing.

The concern regarding fermented foods in cancer patients often stems from the fear that these foods may promote tumor growth or interfere with treatment. However, current research does not provide substantial evidence to support the idea that fermented foods, including yogurt, are harmful to breast cancer patients. In fact, some studies suggest that probiotics may help mitigate some side effects of chemotherapy, such as diarrhea and constipation, and may even enhance the efficacy of certain treatments.

In your mother's case, where she is experiencing constipation, yogurt could be a beneficial addition to her diet. It can help improve bowel regularity due to its probiotic content. However, it is crucial to choose yogurts that are low in added sugars and artificial ingredients, as these can contribute to inflammation and other health issues.

It is also important to consider any specific dietary restrictions your mother may have based on her overall health condition, treatment plan, and personal tolerance. For instance, if she has lactose intolerance or any other food sensitivities, it may be wise to opt for lactose-free yogurt or alternative fermented foods, such as kefir or plant-based yogurts.

In terms of managing her constipation, in addition to yogurt, your mother might benefit from a diet high in fiber, which includes fruits, vegetables, whole grains, and legumes. Staying hydrated is also essential, as adequate fluid intake can help alleviate constipation. If dietary changes do not improve her symptoms, it may be necessary to consult her healthcare provider for additional interventions, such as stool softeners or other medications.

Lastly, it is crucial to maintain open communication with her healthcare team, including oncologists and dietitians, who can provide personalized dietary advice based on her specific medical history and treatment plan. They can help clarify any misconceptions regarding food restrictions and ensure that her diet supports her overall health and treatment goals.

In summary, breast cancer patients do not necessarily need to avoid fermented foods like yogurt, especially if they can help with digestive issues such as constipation. Instead, incorporating these foods into a balanced diet, while being mindful of individual health needs and preferences, can be beneficial. Always consult with healthcare professionals for tailored advice and to address any concerns regarding diet during cancer treatment.

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