Can lifestyle changes reduce the risk of Colorectal Cancer recurrence

Lifestyle Changes and Colorectal Cancer Recurrence: What the Evidence Shows

This is an important question, and the honest answer is: the evidence is still developing, but what we know is encouraging.

What the Research Currently Shows

According to research presented by Nigel Brockton, PhD (Vice President of Research at the American Institute for Cancer Research), there is observational evidence suggesting that exercise may lower the risk of recurrence in colorectal cancer. However, it's important to understand what this means:

• Observational studies show associations between healthy behaviors and better outcomes
• Randomized clinical trials (the gold standard) specifically testing whether lifestyle changes prevent CRC recurrence are still limited
• The evidence is stronger for prevention of initial colorectal cancer than for preventing recurrence

The "Bathtub" Framework: How to Think About This

Dr. [removed] uses a helpful analogy: imagine cancer risk like a bathtub filling with water. Even if you already have colorectal cancer, you can still:

• Slow the flow of additional risk factors by adopting healthy behaviors
• Reduce inflammation and support your immune system
• Improve your overall health to better tolerate treatment and recovery

While we can't necessarily "empty the bathtub" (reverse existing cancer), we can prevent it from getting fuller.

Specific Lifestyle Factors for Colorectal Cancer

According to the American Institute for Cancer Research, five factors have strong evidence for reducing colorectal cancer risk:

1. Whole grains - Aim for fiber-rich whole grain products
2. Foods containing fiber - Vegetables, legumes, fruits
3. Dairy products - May have protective effects
4. Calcium - Either from food or supplements
5. Physical activity - Regular exercise

Five factors increase risk (to avoid or minimize):

• Red meat
• Processed meat
• Alcoholic drinks
• Adult body fatness (obesity)
• Attained height (not modifiable)

Exercise: The Strongest Evidence

The American College of Sports Medicine (ACSM) provides specific exercise guidelines for cancer survivors:

For reducing side effects during/after treatment:

• 90 minutes of moderate-intensity aerobic exercise per week
• Plus 2 resistance training sessions per week

For long-term survivorship (reducing recurrence risk):

• 150 minutes of moderate-intensity aerobic exercise per week
• Plus 2 resistance training sessions per week

Exercise has been shown to improve cancer-related fatigue, sleep quality, anxiety, depression, and body composition—all factors that may influence recurrence risk.

Nutrition and Gut Health

Recent research presented by Dr. [removed] Thomas shows that gut health significantly impacts cancer treatment response and progression:

• A diet rich in phytochemicals (compounds in colorful vegetables, fruits, and herbs) can reduce inflammation
• Probiotics and prebiotic fiber support healthy gut bacteria, which influences immune function
• Poor gut health can reduce immunotherapy effectiveness by up to 40%
• A plant-forward diet emphasizing vegetables, legumes, fruits, and whole grains supports better outcomes

Protein intake matters: Aim for 1-1.2 grams of protein per kilogram of body weight daily.

The Bottom Line: What You Can Do Now

According to the evidence, you should:

✅ Follow cancer prevention recommendations - Even though they were developed for prevention, they're likely beneficial for survivorship ✅ Maintain a healthy weight - Obesity is a modifiable risk factor ✅ Exercise regularly - This has the strongest evidence base ✅ Eat a plant-forward diet - Focus on whole foods, fiber, and colorful vegetables ✅ Limit red/processed meats and alcohol ✅ Work with an oncology dietitian - Personalized guidance matters

Important Caveats

As Dr. [removed] emphasizes: "There is a huge difference between what can be recommended at the population level versus what can be assessed to be potentially beneficial at the individual level."

• These recommendations are based on strong evidence for prevention, with emerging evidence for survivorship
• Your specific situation requires discussion with your oncology team
• Lifestyle changes work best alongside medical treatment, not as a replacement

Questions to Ask Your Oncology Team

1. Based on my specific colorectal cancer stage and treatment, what lifestyle changes would be most beneficial for me?
2. Should I work with an oncology dietitian or exercise specialist?
3. Are there any lifestyle factors I should avoid given my treatment plan?
4. How can I monitor whether these changes are making a difference in my recovery?

---

Sources cited:

• American Institute for Cancer Research (AICR) lifestyle recommendations
• American College of Sports Medicine (ACSM) exercise guidelines for cancer survivors
• CancerPatientLab webinars: "Scientific Research on Lifestyle Choices to Reduce Your Cancer Risk" (Nigel Brockton) and "Nutrition and Gut Health after Cancer" (Robert Thomas, MD)

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