Earlier this year the company changed the milk it sells in the western half of the US to a certified rBST-free supply. The change affects the milk it processes and sells in its City Market, Dillons, Fry’s, Food 4 Less, Fred Meyer, King Soopers, QFC, Ralph’s and Smith’s divisions and Kroger stores in Louisiana and Texas.
Recombinant bovine somatotrophin (rBST) is given to cows to increase milk production. FDA has concluded there is no difference between milk derived from cows treated with rBST and those that have not been treated.