Replacing 10% of ultra-processed food with minimally processed food linked to 2% lower bowel cancer incidence
A study of 461,682 US adults found no significant association between total ultra-processed food intake and bowel cancer incidence. The researchers reported that replacing 10% of intake with the same weight of minimally processed foods was associated with 2% lower incidence, while processed meat products were associated with higher incidence; the observational study cannot establish cause and effect.
Bottom line — After more than 20 years of follow-up, the study found no overall link, but food type mattered.
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PLOS Medicine published the study on 15 October 2026, using data from adults aged 50 to 71 enrolled in 1995–96.
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Researchers recorded more than 10,000 bowel cancer cases during follow-up.
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The Conversation reported that wholegrains, fibre, dairy and calcium from ultra-processed food sources were associated with lower incidence.
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India TV News reported lower incidence for ultra-processed bread, breakfast cereals, frozen desserts and milk drinks, and higher incidence for reconstituted meat and fish products.
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Science Media Centre experts cautioned that the diet questionnaire was completed at baseline and was not designed to measure food processing, leaving room for misclassification.
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Science Media Centre experts noted that the study population was older and predominantly white, so its findings should not be generalised to younger people.