Large Study Finds No Overall Cancer Risk from Ultra‑Processed Foods
460,000‑person study shows total ultra‑processed food intake does not raise colorectal cancer risk, but specific foods differ.
Key facts
- 461,682 Americans aged 50‑71 were followed for a median of 18.8 years.
- No overall association between total ultra‑processed food consumption and colorectal cancer incidence.
- Whole‑grain, dairy, and fiber‑rich ultra‑processed foods were linked to lower colorectal cancer risk.
- Processed‑meat ultra‑processed foods were linked to higher colorectal cancer risk.
- Replacing 10% of ultra‑processed food intake with minimally processed foods was associated with a 2% lower colorectal cancer incidence.
A cohort of 461,682 adults aged 50 to 71 entered the NIH‑AARP Diet and Health Study in 1995 and 1996. Participants completed food‑frequency questionnaires that estimated their intake of ultra‑processed foods. Researchers tracked the cohort through 2018, recording 18.8 years of median follow‑up.
The analysis found no overall association between total ultra‑processed food consumption and colorectal cancer incidence. This result was reported in PLOS Medicine on October 15, according to the National Cancer Institute study led by Erikka Loftfield.
When the researchers examined individual food categories, they found that ultra‑processed whole grains, dairy products, and fiber were associated with a lower colorectal cancer risk, while ultra‑processed processed meats were associated with a higher risk. The study noted that the nutritional content of foods matters more than the level of processing alone.
The team also modeled a substitution scenario. Replacing 10% of ultra‑processed food intake by weight with minimally processed foods was linked to a 2% lower colorectal cancer incidence. The authors cautioned that the findings may not apply equally to all populations, as most participants were older, white Americans.
Context
Ultra‑processed foods are defined by the NOVA classification as foods with five or more ingredients, often containing additives such as preservatives, flavorings, and sugars. They account for more than half of the calories consumed by American adults. Researchers have linked ultra‑processed foods to chronic diseases, but the category includes a wide range of products, making it difficult to assess health effects as a single group.
How outlets headlined it
- ScienceDailyMassive study of 460,000 people challenges ultra-processed food cancer fears
- HealthlineUltra-Processed Food Intake May Increase Dementia, Stroke Risk
- MedicalXpressBlood proteins could reveal clues to prostate cancer risk more than a decade before diagnosis
- HealthlineUltra-Processed Food Intake May Not Be Linked to Colorectal Cancer
- HealthlineDetached Nails More Than 4 Times Higher Among GLP-1 Users, Study Finds
How this was made
Compiled by our AI newsroom from 3 independent outlets, checked by a separate AI editor against the sources. Only claims found in the sources are reported. Spot an error? Every source is linked below.
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