A trial carried out at the Institute of Animal Rearing Technologies of the Lithuanian University of Health Sciences demonstrated clearly the effect of Lumance on gut health and performance. Six hundred 1-day-old Ross 308 broiler chicks were randomly assigned to 1 of 3 dietary treatments for 5 weeks. The dietary treatments were 1) control diet, 2) diet supplemented with Lumance at the level of 1.5 g/kg of feed, 3) diet supplemented with the same mixture as in 2 treatment, but at a higher amount (2 g/kg of feed). The results of growth performance of broiler chickens are presented in Table 1. During 5 week of the feeding the addition of 1.5 g/kg and 2.0 g/kg Lumance in diets for broiler chickens increased the body weight by 2% and decrease in feed conversion ratio by 4%, compared with control group (P>0.05). Analysis of liveability of broiler chicken showed that compound feed supplemented with different content of Lumance during the period of 35 days had no significant influence on the liveability of broiler chickens (P>0.05).