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