This study aims to investigate the effect of different sorghum level of diet supplemented with protease on growth performance, meat quality and serum amino acid of growing pigs. A total of 24 weighing pigs (average weight, 30 ± 7 kg) were randomly divided into 4 groups, and each group converted six replicates. A randomized block design was the control group, the group A (0% sorghum+0% protease), the group B (20% sorghum+0.015% protease), the group C (50% sorghum+0.015% protease), the group D (80%sorghum+0.015% protease), the expe...