Should cancer patients avoid certain foods in their diet?

Whether cancer patients need dietary restrictions depends on specific factors such as the type of cancer, stage of treatment, the patient's physical condition, and nutritional needs. If discomfort or nutrition-related issues arise, it is advisable to consult a doctor or dietitian promptly. The detailed analysis is as follows:

If the patient is in the recovery phase, has normal digestive function, does not have underlying conditions such as diabetes or kidney disease, and the type of cancer does not impose special dietary requirements, a balanced diet is recommended. This includes adequate intake of high-quality protein, fresh fruits and vegetables, and whole grains to help restore strength and boost immunity, without excessive restriction of common foods.

During chemotherapy or radiotherapy, patients may experience symptoms such as nausea, vomiting, diarrhea, or oral ulcers. In such cases, spicy, greasy, raw, cold, and irritating foods should be avoided to prevent worsening of symptoms. If the cancer affects digestive organs—such as gastrointestinal cancers—intake of hard-to-digest foods should be reduced, and soft, easily digestible foods should be chosen to reduce organ burden.

Dietary adjustments should be tailored to the individual’s physical condition and nutritional needs, avoiding either overly restrictive eating or completely unregulated diets. It is recommended to regularly consult doctors or dietitians and adjust the diet plan promptly according to changes in the condition, ensuring sufficient nutrition that aligns with the body’s tolerance, thereby supporting disease stability and effective treatment.