... their diets, and in animal products such as milk. For plants, stigmasterol plays a regulatory function. Humans utilize stigmasterol ... number of chemical processes which are designed to yield synthetics for the pharmaceutical industry.Calabar beans, rapeseed, soybeans, cocoa beans ... use. Progesterone can also be used as a precursor for an assortment of estrogens, androgens, and corticoids, making it ...