A recent study suggests that women who regularly consume high quantities of ultra-processed foods (UPFs) face an increased risk of developing adenomas, a potential precursor to bowel cancer. The research sheds light on the impact of diet on early bowel changes.
Published in Jama Oncology, the study reveals that women who frequently eat UPFs like processed sauces, crisps, processed meats, and ready meals are significantly more likely to develop adenomas in the bowel. While adenomas are noncancerous growths, they can progress to cancer over time, with most bowel cancers originating from adenomas.
With a rising trend in bowel cancer cases among younger adults, researchers have been investigating potential causes. Data from Cancer Research UK show a 62% increase in bowel cancer rates among individuals aged 25-49 since the early 1990s.
The study, funded by Cancer Grand Challenges, analyzed data from thousands of US nurses tracked from 1991 to 2015. Researchers monitored UPF intake through food surveys conducted every four years among 29,105 women with an average age of 45.
The findings indicated 1,189 cases of early-onset adenomas among the participants. Those consuming the highest amounts of UPFs were 45% more likely to have these growths compared to those with lower consumption. The top UPF consumers consumed approximately 9.9 portions daily.
A typical diet with high UPF servings could include sweetened breakfast cereal, white toast with margarine or jam, flavored yoghurt, pre-packaged sandwiches, crisps, sugary drinks, frozen pizzas, chicken nuggets, and desserts like ice cream or biscuits. In contrast, individuals with the lowest UPF intake averaged 3.3 servings per day.
Lead author Dr. Andrew Chan from Harvard Medical School emphasized the need for further research to confirm the link between UPFs and polyp development. The study underscores the importance of dietary quality in preventing early-onset colorectal tumorigenesis.
Professor Charles Swanton, chairman of the Cancer Grand Challenges scientific committee, highlighted the study’s role in understanding the association between diet, gut health, and bowel changes linked to cancer risk. Fiona Osgun, head of health information at Cancer Research UK, emphasized the broader societal changes needed to promote healthier diets and reduce cancer risk, stating that overall diet quality matters more than individual food choices.