What Is The Strongest Phytoestrogen?

What Is The Strongest Phytoestrogen? The strongest known phytoestrogen is 8-PN (4), a compound produced by lupulin glands (Humulus lupulus L.) and present in small amounts (less than 20 μg/L) in beer. This molecule has ER-dependent activity in mammalian cells at a concentration of about 1.0 μM. What are the best phytoestrogens? Flaxseeds. Flaxseeds are