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Originally published January 6, 2023
Last updated June 29, 2025
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Cancer and cancer treatments can and how your body uses nutrients from foods. This is why it鈥檚 important to give your body enough calories, plus the right mix of nutrients, to help you stay strong throughout treatment.
鈥淕ood nutrition is a key part of your cancer treatment and recovery,鈥� says Lisa Statner, MS, RDN, an oncology dietitian with the 喵咪社区 Norris Comprehensive Cancer Center, part of 喵咪社区.
Statner shares nutrition tips for people with cancer, including what foods to add to your diet, what foods to avoid and how to prepare an overall nutrition plan, as you adjust to life after a cancer diagnosis.
Before you start cancer treatment, it鈥檚 important to get a baseline on your diet and nutrition. Statner recommends working with a registered dietitian.
鈥淎 registered dietitian can perform a comprehensive nutrition assessment to identify any unique health concerns,鈥� Statner says. 鈥淒uring this assessment, we evaluate your nutritional status, or how your body is absorbing and using nutrients, at the time of your cancer diagnosis. This evaluation also includes looking at your age and any preexisting conditions, like diabetes or malnutrition. These factors help us understand your nutrition needs and make appropriate recommendations.鈥�
Each person鈥檚 dietary needs will vary before cancer treatment begins. 鈥淚n general, a diet rich in colorful fruits and vegetables, complex carbohydrates, lean proteins and healthy fat is appropriate regardless of the type of cancer,鈥� Statner says.
Protein: Prior to starting your treatment, Statner recommends adding enough protein in your diet to prevent sarcopenia, or muscle loss, which can occur as a result of cancer and cancer treatment. According to Statner, good sources of protein include:
Omega-3 fatty acids: 鈥淪tudies are emerging that show omega-3 fatty acids, especially from fish, flaxseed and walnuts, may help to lessen muscle loss,鈥� Statner says.
Cruciferous vegetables: 鈥淐ruciferous vegetables 鈥� which include broccoli, cauliflower, bok choy, kale, cabbage and arugula 鈥� have long been known to hedge against cancer and cancer recurrence,鈥� Statner says.
Antioxidant-rich fruits and vegetables: She also suggests adding antioxidant-rich, colorful fruits and vegetables to your diet, such as blueberries, blackberries, eggplant, red peppers, papaya, plums and watermelon.
鈥淭hese antioxidant-rich foods seem to have cancer-fighting properties, as well as anti-inflammatory effects,鈥� Statner says. 鈥溾�楨at the rainbow’ is a helpful way to remember to include these foods in your diet.鈥�
Although your nutrition plan may vary based on factors such as the type of cancer treatment you receive and your health at the time of diagnosis, there are key nutrition goals to aim for during cancer treatment.
鈥淢aintaining your weight and understanding your diet tolerance 鈥� how much and what types of food you can comfortably eat 鈥� are important nutrition goals during treatment for cancer,鈥� Statner says.
鈥淐alorie and protein needs typically increase during treatment, so focusing on nutrient-dense foods is important,鈥� she says. 鈥淭ry to eat foods that are high in calories and/or high in protein but smaller in volume, such as avocados, peanut or almond butter and honey.鈥�
Other examples of these types of nutrient-rich foods include:
鈥淗omemade protein smoothies are another good way to double up on nutrients without feeling uncomfortably full,鈥� Statner says.
Cancer and its treatments can affect your habits in several ways, including loss of appetite, changes in taste or smell, and nausea and vomiting.
鈥淟oss of appetite can occur due to cancer treatments, other medications and even stress,鈥� Statner says. Treatments like radiation therapy may cause a temporary loss of taste, while chemotherapy can make foods taste different.
鈥淎nother potential side effect of cancer treatment is a decrease in how much you enjoy food,鈥� she says. 鈥淔ood is an important part of quality of life, but during cancer treatment, it鈥檚 helpful to think of food as another part of your healing regimen.鈥�
Statner also suggests looking out for nausea and vomiting, which can be caused by chemotherapy and radiation therapy. 鈥淢ake sure you notify your doctor at the first symptom of nausea as an anti-emetic may be appropriate,鈥� Statner says.
The American Cancer Society offers tips for other , such as changes in taste and smell, swallowing issues, and mouth sores and pain.
Cancer treatments can affect your and your body鈥檚 ability to protect itself from infections. It鈥檚 important for you to be careful and avoid that may be tainted with bacteria.
鈥淕ood food safety practices are important during cancer treatment. Don鈥檛 leave anything to chance,鈥� Statner says.
鈥淢ake sure all your fruits and vegetables are washed, even prewashed lettuce and vegetables. Only consume thoroughly cooked meat, poultry, seafood and eggs. I also recommend avoiding all deli meats and uncooked hot dogs, which can expose you to , a type of bacteria that may be found in those foods.鈥� She also advises staying away from unpasteurized milk products and beverages.
Finding a diet that helps you stay strong during your cancer treatment may seem challenging, but your care team can help you get the support you need.
鈥淎 registered dietitian can work with you and your family and caregivers to help you understand the side effects of cancer treatment and find solutions to maintain your well-being,鈥� Statner says.
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