The objective of this study was to investigate the influence of grass feeding of cattle on the decontamination capacity against free radical (DCAFR) and vitamin B12 content of beef and veal. The meat samples from intensively (26 cattle, final weight 485±9 kg, concentrate feeding) and ecologically (25 heifers, final weight 472±32 kg, and 28 calves, final weight 260±24 kg, pasture grazing) managed cattle groups were investigated. The DCAFR was colorimetric assessed by examining damage to 1.4 benzoquinone. Vitamin B12 was analyzed by high performance liquid chromatography. Data indicate that the oxidative stability of meat samples from ecological management were significant (p \u3c 0.05) higher (1.39 mg/ ml sec) compared to samples from intensive management (1.09 mg/ ml sec). Meat from pasture grazed animals proves to be an especially good source of vitamin B12, which was present in the high amount in beef (3.24 mg/100g) and veal (3.32 mg/100g). This paper establishes the importance of grass feeding at the levels of the relevant essential nutrients supplied by meat
