The second session moderated by Dr. Eduard Torres, an expert in European law, was dedicated to metagenÈtico pronutrients mechanism whereby the target cells increase production of its specific protein. In this first conference outcomes related to the target cells of the intestine using pronutrients exposed. Dr. Anna Tesouro Biovet, S.A. He presented in vitro studies on intestinal cells and the field results in poultry and swine. At the end of the conference it noted that the use of intestinal pronutrients improved growth performance and improving the physiology of the digestive mucosa prevents the adhesion of bacteria in the enterocytes.