Most of us know that when we go to the store to buy milk, that we have many choices, including amounts of fat and flavors. Those choices also may begin with decisions to buy milk from cows treated or not treated with bovine somatotropin and organic milk. According to Mike Hutjens, a dairy extension specialist at the University of Illinois, there is no difference in the content, quality or wholesomeness in the three kinds of milk. He said all milk, including milk from cows treated or not treated with the hormone rbST and organic sourced milk, contains natural hormones. Milk from cows treated with rbST does not have more hormones than other milk Just what is rbST? It is an artificial hormone that exactly copies a cow’s natural hormones. It improves efficiency and allows the cow to produce more milk. This in turn keeps costs down to consumers. Some dairy farmers decided to use it while others did not, depending on their situation and how they viewed this technology.