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Cancer

A 2015 meta-analysis found an association between higher egg consumption (five a week) with increased risk of breast cancer compared to no egg consumption. Another meta-analysis found that egg consumption may increase ovarian cancer risk.

A 2019 meta-analysis found an association between high egg consumption and risk of upper aero-digestive tract cancers in hospital-based case-control studies.

A 2021 review did not find a significant association between egg consumption and breast cancer. A 2021 umbrella review found that egg consumption significantly increases the risk of ovarian cancer.