Tie By is a vitamin E and selenium powder supplement and preventative for use in horses that regularly "tie-up". Slows lactic acid accumulation while improving oxygen utilization. Contains 1,750 mg vitamin E, 50 ppm selenium, 1,000 mg DMG and 875 mg vitamin C per oz. Dosage: 1 oz per 1,000 lbs body wt daily mixed with food ration.