Relative effectiveness of herbal methionine compared to DLmethionine on growth, performance and carcass responses basis in broiler chickens

BACKGROUND: The degree to which the amount of aningested nutrient is absorbed and available to the body is calledbioavailability. OBJECTIVES: Relative effectiveness of herbalmethionine (H-Met®) compared to DL-methionine (DL-Met)was investigated in this experiment. METHODS: Exponentialregression analysis was used to determine bioefficacy of H-Met®based on body weight gain, feed intake and feed conversion. DLMetand H-Met® were added to a basal diet in 3 and 4 levels,respectively, in starter, grower and finisher periods. Therefore,that met the nutrient and energy requirements of broiler chickens,with the exception of Met+Cys. RESULTS: In the 42-d trial,broilers growth increased significantly (p