The human body makes its primary hormones from the food we eat, specifically from cholesterol. In the male body, progesterone mostly converts to testosterone. All of the food we eat is used by the human body to maintain life and bodily function. This knowledge was the beginning of modern medicine, as mankind worked to improve nature. The original discovery in 1939 that spoiled sweet clover possessed anticoagulant properties is a classic story in pharmacology.
Warfarin is also the active ingredient in various rodenticides and insecticides.
So as you can see, things herbal can be beneficial, and some can be poisonous, depending on what they are and how they are used. So you can easily see that comparing numbers across labels from various manufacturers is an exercise in futility. Over the past several decades, male wisdom and knowledge said that to get any significant benefit from herbs, an individual would have to consume massive quantities of them. This is the philopsophy behind Evanesce and Feminol. Phyto-estrogens do NOT contain actual human hormones or chemicals.