Is Colon Cancer Preventable?
Yes — up to 75% of colorectal cancers could be prevented through lifestyle modifications and regular screening. Unlike many cancers, colorectal cancer has a well-defined precancerous lesion (adenomatous polyp) that can be detected and removed before it becomes malignant.
Dietary Prevention
Increase fibre intake: Whole grains, legumes, fruits and vegetables protect the colon. Aim for 25–35g of fibre daily. Reduce red meat: Limit red meat to 2–3 servings per week. Avoid processed meat (sausages, bacon, cold cuts). Choose anti-inflammatory foods: Olive oil, fish, nuts and berries. Limit alcohol: More than 1 drink per day increases risk.
Lifestyle Factors
Physical activity: 150 minutes of moderate exercise per week reduces risk by 20–25%. Maintain healthy weight: Obesity increases colorectal cancer risk by 30%. Stop smoking: Smokers have twice the risk of colorectal cancer. Adequate vitamin D levels: Emerging evidence for protective effect.
Screening: The Most Effective Prevention
Faecal occult blood test (FOBT): Every 2 years from age 50. Simple, non-invasive, free under national health programmes. If positive, colonoscopy is required. Colonoscopy: Gold standard. Every 5–10 years from age 50, or earlier for high-risk individuals. Detects and removes polyps before they become cancerous. FIT (faecal immunochemical test): More sensitive than traditional FOBT, preferred in many current screening programmes.
High-Risk Groups: Earlier Screening
Individuals with first-degree relative with colorectal cancer: screening from age 40, or 10 years before the age of diagnosis in the relative. Lynch syndrome carriers: colonoscopy every 1–2 years from age 20–25. FAP: annual sigmoidoscopy from age 12–15, consideration of prophylactic surgery.
Concerned about your colorectal cancer risk? At Quenet Torrent Institute we offer expert assessment, genetic counselling and specialised surgical management. Request a consultation.