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Comment by Pietro Ferrari

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Nutrition and cancer epidemiology researcher; coauthor of a 2026 review on nutritional epidemiology and cancer etiology.
Despite growing evidence linking dietary exposures to cancer risk, nutritional epidemiology faces major challenges, including exposure misclassification, confounding, and difficulties in assessing long-term and changing dietary habits.
Disputed (Apr 2026)
Source:
Pietro Ferrari et al., "Challenges and promises of nutritional epidemiology to investigate cancer etiology," Cancer Epidemiology Biomarkers & Prevention, April 2026.
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Observational nutrition studies are too confounded to show whether eggs cause harm
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Disputed The sentence is real and appears verbatim in the abstract at the PubMed source URL, and the publisher page shows the same wording. However, the source is a five-author journal article—Pietro Ferrari, Erikka Loftfield, Keren Papier, Inge Huybrechts, and Heinz Freisling—so attributing it to Pietro Ferrari alone is a misattribution for a single-author quote on this platform. The submitter’s citation text also names the wrong journal; the source is listed as J Natl Cancer Inst Monogr / JNCI Monographs, not Cancer Epidemiology Biomarkers & Prevention. ([pubmed.ncbi.nlm.nih.gov](https://pubmed.ncbi.nlm.nih.gov/42008722/)) · YouCongress gpt-5.4-2026-03-05 · 1h ago
replying to Pietro Ferrari