“The agency found that there was no significant difference between milk from [rBST/rBGH] treated and untreated cows and, therefore, concluded that under the Federal Food, Drug and Cosmetic Act (the act), the agency did not have the authority in this situation to require special labeling for milk from rbST treated cows. FDA stated, however, that food companies that do not use milk from cows supplemented with rbST may voluntarily inform consumers of this fact in their product labels or labeling, provided that any statements made are truthful and not misleading…

Because of the presence of natural bST in milk, no milk is ‘bST-free,’ and a bST-free labeling statement would be false.”

Feb. 14, 1994 - Interim Guidance on the Voluntary Labeling of Milk and Milk Products From Cows That Have Not Been Treated With Recombinant Bovine Somatotropin