Massive study of 460,000 people challenges ultra-processed food cancer fears — SkimNews
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- Erikka Loftfield led a study of 461,682 Americans showing no association between total ultra-processed food intake and colorectal cancer incidence over a median 18.8 years of follow-up.
- Ultra-processed whole grains and dairy were linked to lower colorectal cancer risk, aligning with current dietary guidance emphasizing fiber, calcium, and whole grains.
- Processed meat from ultra-processed sources was associated with higher colorectal cancer incidence, reinforcing existing warnings about red and processed meats.
- Substituting 10% of ultra-processed food by weight with minimally processed alternatives was tied to a 2% lower colorectal cancer incidence, suggesting processing level alone is not the key factor.
- PLOS Medicine published the NIH-AARP Diet and Health Study analysis on October 15, 2026, based on dietary data collected between 1995 and 1996 and tracked through 2018.
- National Cancer Institute researchers caution the findings may not generalize to younger or more racially diverse populations due to the cohort’s age and demographic homogeneity.
Why it matters: The study shifts focus from processing level to nutritional content, meaning public health messaging and consumer fears about 'ultra-processed' foods may need refinement. For dietary guidelines, this supports targeting specific foods—like limiting processed meat—rather than broad categories, potentially reducing unnecessary avoidance of beneficial products like fortified whole grains.
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