Potential for personal modification of risk for developing colon cancer

Area of Science:

• Oncology
• Nutritional Science
• Gastroenterology

Background:

• Environmental factors are implicated in large bowel cancer risk.
• Large bowel cancer risk varies across different sections of the large bowel.
• The National Large Bowel Cancer Program has supported research into environmental risk factors.

Purpose of the Study:

• To assess environmental elements contributing to large bowel cancer risk.
• To identify specific nutritional factors associated with colon cancer.
• To provide evidence-based dietary recommendations for risk reduction.

Main Methods:

• Analysis of research from varied populations and animal models.
• Investigation of nutritional associations with neoplastic disease in the descending and sigmoid colon.
• Evaluation of the relationship between dietary fat, cereal fiber, and cancer risk.

Main Results:

• Colon cancer risk is proportional to dietary fat intake and inversely proportional to stool bulk (cereal fiber intake).
• A diet low in total fat (20% of calories) and high in cereal fiber (30g/day) is indicated for risk reduction.
• Micronutrients like calcium and selenium, and green/yellow vegetables may further lower risk.

Conclusions:

• Dietary modification, specifically reducing fat and increasing cereal fiber, offers a viable strategy for personal large bowel cancer risk management.
• These dietary changes are recommended for the general population and post-treatment cancer patients.
• Further research is needed to confirm the role of specific micronutrients and vegetables in cancer prevention.