There have been many discussions about food additives over the years. Everything from sterioids to antibiotics have been discussed. The drug mentioned in this article known as ractopamine hydrachloride is used to enhance growth while maintaining a lean quality to the final meat product.
I suspect that it came into being largely as a response to a public demand for a leaner product because of the push for healthier eating. In other words we asked for it. Most additives are aimed at increasing product yield and are based in the profit motive under the guise of feeding more people using less resources.
There are also considerable discussions over our genetic engineering efforts with regards to our plant produce as well. Many countries overseas tend to be very skeptical of American food products. They even express some degree of fear. I find it rather interesting that we here rarely raise any kind of concern about such manipulation of our food supply.



