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The article presents results of the studies on chemical composition of femoral, pectoral muscles and liver of broiler chickens of Ross 308 cross when using  “Zaslon 2+”additional nutrition complex to reduce the impact of toxins in the feed, since meat and liver quality of broilers is mainly determined by the content of  protein and fat, the value of the resulting product depends these parametres. The tasks of the study included: specification of moisture, dry matter, protein, fat and  leach in the muscles and liver of chickens. Broiler chickens of Ross 308 cross, which were raised up to 38 days were the object of the research. Two groups of 1-day  old chickens were formed, 1000 heads in each, without gender division. The control group received the main diet, as for the experimental group, the main ration  and a complex of additional nutrition were used at the dose of 0.5 kg per 1 ton of compound feed to reduce the effect of toxins in the feed. On the 14th, 21st and  38th days of the study, a control slaughter of chickens was carried out in order to study the chemical composition of bird muscles and liver. There was a decrease  in the amount of moisture with an increase of dry matter, crude leach and protein, while the amount of fat in broiler chickens of the experimental group, where  there was the main diet and “Zaslon 2+” deceased in comparison with the control group where only the main diet was used. It indicated positive influence of the  studied feed additive of complex action on chemical composition of the muscle tissue and liver of broilers and improvement of dietary properties of the products

CHEMICAL COMPOSITION OF MEAT AND LIVER OF BROILER CHICKENS IN CASE OF USAGE OF «ZASLON 2+» ADDITIONAL NUTRITION COMPLEX IN THEIR RATION