Virtually all flavonoids containing substances have so called phyto-estrogens, and vice versa. All phytoestrogens belong to the flavonoid family. As I've mentioned in The Anti-Estrogenic Diet book, only few flavonoids are estrogen promoters (such as soy isoflavones). The flavones in coffee are not estrogen promoting. In fact, there is evidence that certain flavones in coffee (caffeol and caffesol) have anti cancerous and beneficial estrogen modulating properties. Coffee is rich also in indoles with great nerve protective benefits. And the same holds true for green tea and chocolate. Do not fall in to the trap of avoiding anything that has phytoestrogens (like many websites suggest), rather do a careful research. For instance both flaxseed and sesame seeds have phytoestrogens, but nevertheless both have shown to suppress over-estrogenic activity and thus work as anti-cancerous foods. If cultivated, roasted and applied properly, coffee can be highly beneficial. It has been traditionally used by different groups of people in South America, North Africa, the Middle East and the Mediterranean - all who have been notorious for their great health (lean, functional, vigorous). In times when we need to tackle the real detrimental effects of industrial xenoestrogens and junk food, let's not split hairs on coffee.