This is: "one of the first applications of genetic engineering used in food production. When the artificial hormone, which is made in genetically modified bacteria, is injected into cows, it increases milk production by about a gallon a day" (Martin and Pollack, 2008).

While there are multiple controversies surrounding the hormone's animal, environmental, and human impacts, it still has not been banned in the U.S. at the time of writing.

However, in 2008, Monsanto will move to stop their production of the hormone in response to increased public mistrust of milk created with growth hormones.