Although Canada and the European Union have banned the use of bovine recombinant growth hormone in dairy cows due to its health risks for both humans and cows, the Food and Drug Administration has dismissed evidence for these risks in order to approve the use of rBGH. The following is a sampling of research, funded by government agencies and major universities – that raises serious concerns about the safety of rBGH/rBST and challenges FDA approval of the use of this hormone. Please note that in some studies rBGH also is referred to as bovine somatotropin, or rBST.

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