Thank you for contacting General Mills concerning BST.
BST (bovine somatotropin) is a hormone naturally found in cows. The synthetic version of this hormone (not to be confused with a steroid hormone) has been subjected to extensive testing. The Food & Drug Administration, American Medical Association, National Institutes of Health, the U.S. Department of Agriculture along with a number of other science-based organizations have concluded that there are no food safety issues in conjunction with milk produced by BST-supplemented cows.
Because BST is naturally found in all cows′ milk, there is no scientific way to test the milk to determine if the BST present is from synthetic sources or natural sources. The amount of BST present in milk will not be greater from a synthetic source than it would be occurring naturally.
For more information about Bovine Somatotropin (BST) or Bovine Growth Hormone (BGH) you may wish to visit the United States Department of Agriculture′s website at www.usda.gov.
We hope you will continue to enjoy our products.
General Mills Consumer Services