Congresswoman Louise M. Slaughter (D-NY) and Congressman Edward J. Markey (D-NY) have issued a joint-demand for information to FDA Commissioner Margaret Hamburg regarding recent reports and prior FDA studies which may indicate that significant levels of antimicrobial residues may be present in DGS. The Ethanol production byproduct, DGS (Distillers Grains with Solubles) is extensively used as a livestock and poultry feed ingredient.

The May 11, 2012 letter to FDA Commissioner Margaret Hamburg is posted below: