People receiving cancer treatment may wonder what to eat or avoid, and may hear claims that certain foods can make cancer go away. This overview separates nutritional support and symptom management from treatment of the cancer itself.
The nutrition goal is adequate intake and managing side effects
During treatment, nutritional needs depend on the cancer, treatment method, symptoms and other health conditions. Some people may develop mouth sores, nausea, difficulty swallowing or loss of appetite. Dietary guidance should be adapted so the person can eat and receive enough nutrients, with support from the care team. The same list of prohibited foods should not be applied to every patient.
No single food cures cancer
The National Cancer Institute (NCI) says there is no evidence that a particular food or dietary supplement treats or slows cancer in place of standard care. A nutritious diet can support health and nutrition, but it should not be described as an “anti-cancer food” or used as a reason to stop treatment.
Tell your care team about supplements and dietary restrictions
Some herbs, antioxidants and dietary supplements can interfere with treatment. Before eliminating a food group or adding a product, discuss it with your doctor or an oncology dietitian—especially if you are eating very little or losing weight.
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