Use Opta-Champ during the last 40 days to increase muscle mass and improve feed eciency. Opta-Champ utilizes the optimum level of the FDA approved ingredient Optaexx to redirect nutrients that would have become fat and repartition them into protein. The process has been proven to increase muscle mass 4 to 7%. Approved for market cattle only. Feed at the rate of .40/pound per head per day.