If rbST doesn't cause health problems, why is Challenge moving to milk produced without it?

We believe in choice. Our customers have spoken, and we're listening. Our independent research indicates that 70 percent of butter consumers are concerned about the use of rbST, 60 percent want no added hormones or rbST in dairy foods, and 74 percent expect premium quality dairy products to have no added hormones or rbST. We believe they should have the opportunity to choose products with milk made from cows not treated with rbST.