Early-Onset Bowel Cancer Cases Rising Globally, Scientists Investigate Risk Factors and Prevention

The Rising Tide of Early-Onset Bowel Cancer

Early-onset bowel cancer, defined as cases occurring before the age of 50, is experiencing a global increase.

In Britain, individuals under 49 are approximately 50% more likely to develop bowel cancer today compared to the early 1990s. This concerning rise has prompted a £20 million research initiative, the Prospect study, led by Professor Sarah Berry, a nutritional science expert at King's College London, to identify the causes and develop prevention strategies.

The Prospect Study: Investigating Causes and Prevention

The Prospect study aims to identify common characteristics among young individuals who develop early-onset bowel cancer. Researchers plan to recruit thousands of young, healthy Britons and monitor their diet, lifestyle, and genetics over several years. The objective is to gather crucial knowledge for future prevention strategies.

Professor Berry indicates that an estimated 50% to 60% of bowel cancer cases may be preventable through lifestyle changes.

Key Suspected Risk Factors and Preventative Measures

Several factors are currently under investigation as potential contributors to the rise in early-onset bowel cancer. Based on existing knowledge of these suspected risk factors, individuals can consider making proactive lifestyle adjustments.

The World Health Organization classifies regular consumption of processed meats, such as bacon, ham, and sausages, as carcinogenic.

Studies indicate that eating 50 grams of processed meat daily can increase bowel cancer risk by 18%. Nitrates used in preservation are suspected contributors to this risk.

Beverages like fizzy drinks and juices are identified as significant risk factors. A 2020 U.S. study found that women consuming two sugar-sweetened beverages daily were twice as likely to develop early-onset bowel cancer compared to those consuming one per week. Reports suggest that consumption of these drinks among young people in the UK is increasing.

Artificial ingredients in UPFs, including emulsifiers, flavorings, and stabilizers, are emerging as potential causes.

UPFs constitute about 40% of the British diet. A Chinese study found a higher likelihood of bowel polyps—abnormal growths that can become cancerous—in young women with high UPF diets. Experts suggest these chemicals may irritate the gut lining, or that UPFs may simply lack essential nutrients. Further research is ongoing to confirm this link.

Less than 10% of Britons consume the recommended 30 grams of fibre daily.

Studies show that for every additional 10 grams of daily fibre consumed, bowel cancer risk can decrease by 10%. Fibre is theorized to bulk out waste, potentially diluting harmful cancer-causing chemicals and protecting the intestinal lining.

Consuming more than 14 units of alcohol weekly increases bowel cancer risk by 25%. Emerging evidence also suggests that drinking alcohol without food may further increase this risk by 10%; a UK study noted this greater risk. Food may absorb alcohol, potentially reducing damage to the gut lining.

Inflammatory bowel disease, which includes Crohn's disease and ulcerative colitis, affects half a million Britons. According to a Swedish study, IBD is linked to an approximate 600% increased risk of bowel cancer.

Persistent inflammation in the intestine due to IBD is believed to trigger cancerous changes.

A 2021 study also linked high UPF diets to an increased likelihood of developing IBD.

Prolonged sitting is associated with higher rates of bowel cancer. A 2023 study found that individuals watching television for five or more hours daily were 30% more likely to develop bowel cancer. This trend may also apply to those in desk-based jobs; a 2011 Australian study concluded that people who spent over ten years working at a desk were twice as likely to develop bowel cancer as those with physically active jobs. This link may be partly attributed to higher rates of obesity and diabetes associated with inactivity.

Public figures affected by the disease include James Van Der Beek, who passed away at 48, and Dame Deborah James, who passed away at 40.