In a study from Harvard University, researchers found a strong link between egg intake and cancer growth in the breast, ovary and prostate.
Previous evidence suggests that egg intake may be implicated in the aetiology of sex hormone-related cancers. However, dose-response relationships between egg intake and such cancers are unclear.
In the study, the team conducted a dose-response meta-analysis to summarise the dose-response link between egg consumption and the risk of breast, prostate and gynaecological cancers.
The team found for breast cancer, consuming ≥ 5 eggs/week was strongly associated with an increased risk of breast cancer compared with no egg consumption.
For other cancers investigated, there was a cancer risk increase for 5 eggs consumed/week for ovarian cancer and for fatal prostate cancer.
No evidence was found for an association with the risk of total prostate cancer.
The team says high egg intake may be associated with a modestly elevated risk of breast cancer, and a positive association between egg intake and ovarian and fatal prostate cancers cannot be ruled out.
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The study is published in British Journal of Nutrition and was conducted by N Keum et al.
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