Cancer nutrition is not a list of superfoods. Needs can change with diagnosis, treatment, symptoms and other health conditions. The priorities may be maintaining weight and muscle, managing side effects, or correcting a specific deficiency.
Screen early for nutrition problems
Unplanned weight loss, reduced intake, mouth pain, nausea, diarrhea, constipation and swallowing difficulty deserve attention. Earlier support is often easier than trying to reverse a large decline later.
Protein and calories may become priorities
During treatment, a generally healthy eating pattern may need practical adjustments. Small frequent meals, energy-dense foods or modified textures can be helpful, but recommendations should reflect your symptoms and medical needs.
Supplements are not automatically better
Herbal products, vitamins and concentrated supplements can interact with medicines or treatment. Tell your oncology team and pharmacist everything you take, including products described as natural.
A dietitian turns advice into a plan
A registered dietitian can consider food preferences, culture, budget, kidney or metabolic conditions and treatment effects. The goal is a plan you can follow, not a perfect menu.
The key idea
Prehab should be personal, practical and connected to your healthcare team.
Do not start or intensify exercise, change medication, or use supplements because of an online article. Ask a qualified clinician what is appropriate for your health and treatment plan.
Sources and further reading
- National Cancer Institute nutrition guidance ↗
- American Cancer Society nutrition and activity guideline ↗
- Macmillan cancer prehabilitation guidance ↗
For the broader evidence base, visit Preluma's supporting research library.
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Medical disclaimer: This article is general education, not medical advice, diagnosis or treatment. Follow the instructions of your surgeon, oncology team, primary-care clinician and other regulated healthcare professionals. Seek urgent care for severe or sudden symptoms.