What should I eat during Colorectal Cancer treatment

Nutrition During Colorectal Cancer Treatment

I'm glad you're thinking about nutrition—what you eat during treatment can significantly impact your energy, side effects, and overall well-being. Let me explain what the evidence shows and what questions to discuss with your care team.

How Nutrition Affects Treatment

During colorectal cancer treatment, your body faces extra demands:

• Chemotherapy and radiation can affect your appetite, digestion, and how your body absorbs nutrients
• Surgery requires extra protein and calories for healing
• Side effects like nausea, diarrhea, or constipation can make eating challenging

Your nutritional status directly affects your ability to tolerate treatment and recover.

---

General Dietary Principles (Based on Evidence)

According to NCCN Guidelines for Colorectal Cancer, survivors and patients undergoing treatment benefit from:

✅ Foods to Emphasize:

• Fruits and vegetables - aim for variety and color
• Whole grains - brown rice, whole wheat bread, oatmeal
• Lean proteins - fish, poultry, legumes (beans, lentils)
• Plant-based sources - nuts, seeds, plant oils
• Dairy products - milk, yogurt, cheese (if tolerated) - evidence suggests calcium and dairy may be protective

⚠️ Foods to Limit or Avoid:

• Red and processed meats - the NCCN Guidelines note these are associated with worse outcomes in colorectal cancer survivors
• Refined grains and concentrated sweets - linked to increased recurrence risk
• Sugar-sweetened beverages - research from the CALGB 89803 trial found high intake associated with increased recurrence and death in stage III disease
• High glycemic load foods - foods that spike blood sugar quickly

---

Important Treatment-Specific Considerations

Your treatment type matters:

• During chemotherapy: You may need smaller, more frequent meals; focus on foods you can tolerate; stay hydrated
• After surgery: Protein becomes especially important for wound healing (aim for 1.2-1.5g per kg of body weight daily)
• With bowel dysfunction: Diet may need modification based on severity of diarrhea or constipation

---

Questions to Ask Your Oncology Team

Since nutrition needs vary based on YOUR specific treatment plan, ask your care team:

1. "Should I see a registered dietitian who specializes in oncology?" - This is often covered by insurance and can be invaluable
2. "Are there specific foods I should avoid during my treatment?" - Some interact with medications or worsen side effects
3. "What's my protein goal during treatment?" - This varies by treatment type and your body weight
4. "How should I handle side effects like nausea/diarrhea with my diet?" - Your team can give specific strategies
5. "Are there supplements I should take or avoid?" - Some supplements can interfere with treatment

---

Practical Tips During Treatment

• Eat when you're hungry, not on a schedule
• Keep foods simple - bland, easy-to-digest options often work better during treatment
• Stay hydrated - water, broth, herbal tea
• Prepare meals ahead when you have energy
• Don't force yourself to eat foods that make you feel worse
• Track what works - keep notes on which foods help you feel better

---

Long-Term Nutrition (After Treatment)

The NCCN Guidelines emphasize that survivors of colorectal cancer should maintain healthy eating patterns long-term to reduce recurrence risk. The dietary patterns that help during treatment—more plants, less red meat, whole grains—continue to be protective after treatment ends.

---

Important Reminder

This information is educational. Your oncology team, and ideally a registered dietitian specializing in cancer care, should guide your specific nutrition plan based on:

• Your treatment type and stage
• Any side effects you're experiencing
• Your overall health status
• Your personal food preferences and tolerances

According to NCCN Guidelines, a multidisciplinary approach—including nutritional support—is essential for managing colorectal cancer effectively.

This information is for educational purposes only. Always consult your healthcare team for personalized medical advice and decisions.