Money today is fiat money, a symbol of value created by the human imagination with no intrinsic value of its own. A coin or paper currency note has value because people accept it as a symbolic medium of exchange. The economic value of money as measured by its purchasing power is a subject of economic theory. However economics does not explain how individual human beings and societies came to accept symbolic money as a medium of exchange or store of value. The process of according value to a symbol is psychological and social.
Phytoestrogens in Soy Milk. Foods and beverages made from soy contain chemicals called isoflavones. These chemicals have estrogen-like effects on the body, so they are often called phytoestrogens -- that is, estrogen that comes from plants. The isoflavones can bind to estrogen-responsive areas on cells in the reproductive organs, liver, brain and other tissues.
Stockbyte/Stockbyte/Getty Images. Foods that contain phytoestrogens include soy foods such as tofu, soy milk, tempeh and soy protein powder. Other foods have estrogenic effects, meaning that the body can mistake them for estrogen: fennel seed and cinnamon are two examples.