A Natural Source of Vitamin E for all classes of horses. Natural-Source of Vitamin E Biologically Active Formula Derived from Natural Plant Oils Supports Nerve Function Supports Muscle Function Nutritional support for healthy immune function Powerful Antioxidant Powder Form Supports Topline Vitamin E is an essential and required nutrient, but is not produced by the horse’s body, therefore must be obtained through food. Natural Vitamin E is a powerful antioxidant and works closely with Selenium and Vitamin C to protect the body from the oxidative stress. Horse would naturally consume Vitamin E from fresh green pasture but due to current management pasture is not often available to horses. If Vitamin E levels are too low a horse may become lethargic, suffer from sore muscles and have decreased immune function.