Milk and Dairy Products

A note on nomenclature rbST is known by many names. These include "bST," "bGH," "rbGH", "recombinant bovine growth hormone" and "Posilac." The clinical name for the naturally occurring protein hormone produced in the pituitary glands of all cattle is "bovine somatotropin," denoted as "bST." Human beings have learned how to reproduce an exact copy of this substance by means of recombinant DNA technologies. This version of bST is called "recombinant bovine somatotropin" or "rbST." These are the names scientists use to describe these substances. source:www.rbstfacts.org