Increase in plasma total antioxidant capacity of grazing J apanese B lack heifers and cows in forestland in J apan

Blood total antioxidant capacity ( TAC ) has become a key bio‐marker for animal health. Forest‐grazing cattle are known to forage various native plants that have high TAC . This study evaluated differences of plasma TAC between forest‐grazing ( FG ) and pasture‐grazing cattle ( PG ). Experiment 1 monitored the plasma TAC levels of 32 Japanese Black cattle. The level in PG did not change throughout the grazing period. However, that in FG , which increased from summer, was significantly higher than that in PG through fall ( P