In December 2018 researchers from Italy published their review of the medical scientific literature to assess the effect of green tea on the risk of breast cancer. The risk of breast cancer recurrence and risk of breast cancer in relation to menopausal status were also evaluated. A total of 13 studies, involving 163,810 women, were included in the review. Results showed that a higher consumption of green tea appeared to be associated with a reduced risk of breast cancer. A further analysis revealed that green tea had a potentially protective effect against breast cancer, especially for breast cancer recurrence.
Gianfredi V et al. Green Tea Consumption and Risk of Breast Cancer and Recurrence-A Systematic Review and Meta-Analysis of Observational Studies. Nutrients. 2018 Dec 3;10(12). pii: E1886