In 1994, the FDA issued labeling guidelines for milk (and dairy products made with milk) produced by cows that have not been treated with rBST. In its guidelines the FDA stated: “Because of the presence of natural bST in milk, no milk is ‘bST-free,’ and a ‘bST-free’ labeling statement would be false.”
The FDA advised that the following statement should be included on all products labeled as being made with milk from cows that are not treated with rBST: “No significant difference has been shown between milk derived from rbST-treated and non-rbST-treated cows.”