Intake of fish and marine n-3 polyunsaturated fatty acids and risk of breast cancer: meta-analysis of data from 21 independent prospective cohort studies

To investigate the association between intake of fish and n-3 polyunsaturated fatty acids (n-3 PUFA) and the risk of breast cancer and to evaluate the potential dose-response relation.Meta-analysis and systematic review of prospective cohort studies.PubMed and Embase up to December 2012 and references of retrieved relevant articles.Prospective cohort studies with relative risk and 95% confidence intervals for breast cancer according to fish...