Use Opta-Champ during the last 40 days to increase muscle mass and improve feed efficiency. Opta-Champ utilizes the optimum level of the FDA approved ingredient Optaflexx™ 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. 30 day supply.