A sustained release anti-oxidant bolus containing a combination of vitamin E, selenium and grape extract. Intended for adult cattle on grass or forage-based diets with a liveweight over 400kg. Eroding technology means consistent supply of nutrients. Supports anti-oxidant levels during the transition period when the cow is under stress and when vitamin E levels fall at calving. Optimises colostrum quality and calving intervals making easier, cleaner calvings. Reduces the risk of metritis and mastitis. Optimises reproductive performance and the immune status. Contains no GMOs or material of animal origin. Bolus applied in one single, simple application with an active life of approximately 60 days.