Chicago- Blood samples from women for whom breast cancer has come back had high levels of estrogen although most of them had been treated with estrogen blocking drugs, U.S. researchers reported.

The researchers said that the finding recommends women with a history of breast cancer to take extra steps like that of weight management and regular exercise in order to lessen their estrogen levels and reduce the risk of the cancer’s return.

Estrogen has been highly linked with the development of many breast cancers. However, very few researches have examined at the connection between high estrogen levels and cancer recurrence, particularly in women who are treated with anti estrogen drugs such as tamoxifen.

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