EN
The aim of the study was to compare the nutritive value of bullock and heifer meat, i.e. its chemical composition, fatty acid profile of intramuscular fat and macro-and micro elements content. Random samples of m. longissimus lumborum and m. semitendinosus were assessed from the carcasses of bullocks (n=12) and heifers (n=12) aged 18 months of Polish Holstein-Friesian breed Black-and-White strain. The results of the study indicate that, compared to heifers, the meat from the longissimus lumborum and semitendinosus muscles of young bulls was characterized by a significantly low fat content, and the muscles of young bulls (in comparison to heifers) had higher level of macro (i.e. K, Ca, Mg) and micro elements (i.e. Zn, Fe, Mn). The semitendinosus muscle of young bulls possessed the highest percentages of PUFA, but the lowest share of MUFA and SFA in intramuscular fat. Beef from young Black-and-White cattle is an important source of balanced protein in the human diet as well as micro elements (mainly Zn, Cu and Fe) and polyunsaturated fatty acids, especially CLA.