Colorectal Cancer

A primary malignant neoplasm involving any part of the gastrointestinal system.

70 recommendations

Last updated: February 27, 2026

Diet

Dietary fiber

Higher dietary fiber intake linked to 15-30% lower colorectal cancer risk

Suggested

8 studies

Red meat

Grilling or barbecuing red meat increases colorectal cancer risk by 63%

AvoidCaution

8 studies

Processed meat

Processed meat consumption directly increases colorectal cancer risk across multiple populations

AvoidCaution

6 studies

Alcohol

Alcohol consumption increases colorectal cancer risk in a clear dose-dependent pattern

Avoid

4 studies

Fruits and vegetables

Higher fruit and vegetable intake linked to meaningful colorectal cancer risk reduction

Suggested

4 studies

Whole grains

Regular whole grain consumption linked to significant colorectal cancer risk reduction

Suggested

4 studies

Cruciferous Vegetables

Regular cruciferous vegetable intake linked to 17% lower colorectal cancer risk

Suggested

3 studies

Dairy products

Dairy consumption linked to reduced colorectal cancer risk across large-scale studies

Suggested

2 studies

Dietary Fat

High dietary fat intake linked to increased colorectal cancer risk warranting moderation

Caution

2 studies

Folate

Adequate dietary folate intake linked to meaningful reduction in colorectal cancer risk

Suggested

2 studies

Fruits

Higher fruit intake linked to significantly reduced colorectal cancer risk

Suggested

2 studies

Supplements

Calcium

Calcium supplements show no clear colorectal cancer benefit alone

CautionSuggested

4 studies

Vitamin D

Higher vitamin D levels linked to 37% lower colorectal cancer risk

Suggested

3 studies

Actions

Physical activity

Regular physical activity reduces colorectal cancer risk by 16-30% across multiple endpoints

Suggested

15 studies

Weight management

Maintaining healthy body weight reduces colorectal cancer risk and improves post-diagnosis survival

Suggested

8 studies

Weight loss

Weight management reduces colorectal cancer risk by up to 47% through lifestyle modification

Suggested

7 studies

Colorectal cancer screening

Regular fecal occult blood screening cuts colorectal cancer mortality by up to 64%

Suggested

5 studies

Smoking cessation

Smoking significantly increases colorectal cancer risk and undermines post-treatment surveillance accuracy

Avoid

5 studies

Faecal immunochemical test screening

FIT screening detects colorectal cancer early and prevents thousands of deaths annually

Suggested

3 studies

Waist circumference monitoring

Waist circumference tracking outperforms BMI for predicting colorectal cancer risk

Suggested

2 studies

Weight management to BMI 22-24

Maintaining a healthy BMI of 22-24 improves colorectal cancer survival outcomes

Suggested

2 studies

Red Flags

Blood in stool

Blood in stool is a critical early warning sign requiring prompt colorectal cancer evaluation

See Doctor Soon

14 studies

Changes in bowel habits

Persistent bowel habit changes warrant prompt medical evaluation to detect colorectal cancer earlier

See Doctor Soon

7 studies

Unexplained weight loss

Unexplained weight loss signals higher mortality risk and demands prompt medical evaluation

See Doctor Soon

3 studies

Changes in bowel habits or rectal bleeding

Persistent bowel changes or rectal bleeding warrant prompt medical evaluation for colorectal cancer

See Doctor Soon

2 studies