The iodine source in Compass Minerals(R) American Stockman(R) Hi-Salt(R) with EDDI is organic, which has been found to more effective than conventional iodine in improving feed utilization, animal growth, and herd reproduction. This formula contains twice the zinc, three times the manganese or iron, and quadruple the amount of iodine of standard trace mineralized salt. Appropriate for all classes of beef and dairy cattle. | American Stockman Hi-Salt with EDDI Bag | Size 50 lbs