Tagged: er-beta PicturesList 01 The body · 1 Sep 2026 Rooibos and Breast Cancer, What a Lab Study Found A Stellenbosch University lab found that rooibos extract steers estrogen toward the receptor that suppresses tumor growth rather than the one that drives it, in breast cancer cells grown in a dish. The researcher who found it is the first to say what that does not yet prove. Nothing filed under this topic yet.