Is there a link between low fibre diets and stomach or colon cancer?

Yes, a strong link exists between low-fiber diets and an increased risk of colorectal (colon) cancer, as fiber helps bind carcinogens, aids digestion, and produces protective fatty acids. Consuming less than the recommended amount of fiber is associated with higher risks of colon cancer, while high fiber intake is generally protective.

Key Findings:

Colorectal Cancer Link: Evidence strongly suggests that high fiber intake (from whole grains, vegetables, fruits) lowers the risk of colon cancer. A low-fiber diet is considered a risk factor, especially in industrialized, Western-style diets.

Mechanisms of Protection: Fiber works by speeding up waste transit (reducing carcinogen exposure), producing protective compounds (like butyrate) via gut bacteria, and helping maintain a healthy weight.

Recommended Intake: Experts suggest consuming at least 30 grams of fiber daily to reduce cancer risk.

Stomach Cancer: Some studies indicate that high fiber intake may also lower the risk of other digestive cancers, including stomach (gastric) cancer.

While some studies have shown mixed results, the consensus from numerous studies is that high fiber intake is protective against colorectal cancer.