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Observational study finds no link between ultra-processed food intake and breast cancer risk in postmenopausal women, suggesting BMI adjustment may distort results.
UPF intake was not associated with postmenopausal breast cancer in the NIH-AARP cohort. Inverse trends observed after adjusting for BMI are likely spurious, owing to over-adjustment.
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O’Connell et al. (2026) studied this question.
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