Although many vitamins are known to be important to cattle, the one that is routinely added to most cow-calf/stocker/feedlot diets is vitamin A (20,000 to 40,000 IU daily). In recent years, vitamin E has taken on new significance in cattle diets. For example, supplementing highly stressed calves with 400 to 1,000 IU of vitamin E daily during the receiving period has been beneficial. Vitamin E has also shown a substantial increased shelf-life of fresh beef when fed at 500 IU per day for the last one hundred days before slaughter.