This short guide covers how diet relates to cancer risk and how to eat during cancer care. For more detail, see antioxidant-rich diets and cancer prevention, dietary fibers and cancer risk reduction, and Nutrition During Chemotherapy. It is general education and not a substitute for advice from your oncology team.
Understanding Nutrition and Cancer Risk
A well-balanced, nutritious diet is one of several lifestyle factors associated with cancer risk. No diet can guarantee that cancer will not develop, and cancer can occur in people who eat very well.
Impact of Nutrient-Dense Foods on Cancer Risk
Diets rich in nutrient-dense foods (antioxidants, vitamins, and minerals) have been linked to a lower risk of certain types of cancer in some studies. Regular intake of fruits and vegetables, for instance, is part of a healthy eating pattern. See antioxidant-rich diets and cancer prevention and dietary fibers and cancer risk reduction for more.
Diet, Lifestyle and Cancer Risk
Diet and lifestyle together are associated with cancer risk.
Importance of Physical Activity Alongside Nutrition
A lifestyle that includes regular physical activity alongside a nutritious diet is associated with better overall health and a lower risk of some cancers. Being active also helps support healthy weight and digestion.
Dietary Adjustments During Cancer Care
Nutrition also matters for people who are being treated for cancer.
Optimizing Diet During Cancer Treatment
Adjusting eating habits to match your body's needs during treatment can help with strength, side effects such as nausea and loss of appetite, and quality of life. Needs differ widely from person to person, so work with your oncology team. Do not start supplements during treatment without checking with your oncologist, because some can interact with cancer treatment. See Nutrition During Chemotherapy.
The Role of Nutrition Post-Treatment
Nutrition still matters after treatment ends. A healthy, balanced diet supports recovery and overall health.
Diet for Post-Treatment Recovery
Eating a balanced diet after treatment can help with recovery and managing side effects. Ask your oncology team and dietitian what is right for you.
Specialist Guidance for Cancer-Related Nutrition
Professional guidance is important for personalized nutrition during and after cancer care.
Collaborating with Dietitians
Working with a dietitian who specializes in oncology nutrition helps you build an individualized plan that suits your needs and strength levels.
Ongoing Research on Nutrition and Cancer
Research on diet and cancer is ongoing, and guidelines continue to be updated as new evidence emerges.
Conclusion
A balanced, nutrient-rich diet and an active lifestyle are part of a healthy lifestyle and are associated with lower cancer risk, but they cannot guarantee prevention. If you are going through cancer care, an oncology dietitian and your care team can guide your eating during and after treatment.
Frequently Asked Questions – FAQ's
Can a healthy diet completely prevent cancer?
No. A healthy diet is associated with a lower risk of some cancers, but it is not a guarantee against cancer. It is just one of several lifestyle factors that influence cancer risk.
What foods should I avoid to reduce my cancer risk?
Highly processed foods, red and charred meats, and foods high in added sugars are associated with higher cancer risk in some studies and are best limited.
Can I adjust my diet to help manage the side effects of chemotherapy?
Yes, with the guidance of an oncology dietitian, certain dietary modifications may help manage side effects like nausea and loss of appetite.
What should a post-treatment diet look like?
A post-treatment diet should be balanced and include fruits and vegetables, lean proteins, and whole grains to support healing and recovery. Follow the advice of your oncology team.
How can I work with a dietitian to improve my diet for cancer prevention or management?
You can ask your doctor for a referral to an oncology dietitian who can create an individualized diet plan based on your specific needs, preferences, and health status.
