Previous research conducted by Lammers et al. (2007a) showed the addition of glycerol to swine diets did not affect growth performance. Our data differ slightly from these previous data, as glycerol tended to increase ADFI compared with pigs fed the control diets. Lammers et al. (2007a) demonstrated no difference in ADG, ADFI, G:F, or carcass composition in pigs fed glycerol at 5 or 10% inclusions. Lammers et al.