VITAMIN E enhances muscle tone and endurance in working horses and also improves circulation. Vitamin E improves heart function, enhances the immune system and acts as a potent antioxidant. As an antioxidant, Vitamin E is every important to the diet for their free radical scavenging properties. Free radicals are produced in higher quantities during times of stress such as heavy exercise, illness or injury. Beneficial for the prevention of tying up.