Protective effects of curcumin on laying hens fed soybean meal with heat-induced protein oxidation

Abstract

This study was performed to investigate the effects of curcumin supplementation on intestinal barrier function, serum biochemical index, amino acid profile, and mRNA expression of nutrient transporters in laying hens fed soybean meal with heat-induced protein oxidation. A total of 288 40-week-old Hy-Line Brown laying hens were allocated into one of three treatments with eight replicates of twelve birds each for a 42-day feeding trial. The birds were fed a soybean meal-corn basal diet and a heated soybean meal (HSBM)-corn basal diet supplemented with or without 150 mg/kg curcumin. HSBM increased circulating diamine oxidase activity and D-lactate levels, and curcumin reduced D-lactate concentrations in birds fed HSBM (p