Natural E 1.32kg – Horse Natural Vitamin E & Selenium Supplement What is Vitamin E? Vitamin E is a powerful antioxidant vitamin that cannot be made by the horse and must be obtained from the diet. Vitamin E is essential for healthy functioning of muscles, the immune system, reproductive function and the nervous system. Many horses may have an increased need for Vitamin E, including those on low Vitamin E intake due to low quality forage, those on diets with added oil, those in work, “older” animals and those used for breeding. Many Vitamin E supplements use the much cheaper synthetic forms of Vitamin E. Natural E, as the name suggests provides a natural source of Vitamin E which has up to double the biological activity than synthetic forms of Vitamin E. Natural E also contains organic selenium which is essential for the optimal activity of Vitamin E. Natural E deliver 3000IU of Vitamin E activity and 1mg of selenium per daily horse feeding rate.Where do horses get Vitamin E from?Horses cannot make Vitamin E and must get it from their diet. It is therefore essential that sufficient Vitamin E is fed or supplemented.What form of Vitamin E is best – Natural or Synthetic?Many Vitamin E supplements use the much cheaper synthetic forms of Vitamin E. Natural E, as the name suggests provides a natural source of Vitamin E which has up to double the biological activity than synthetic forms of Vitamin E. Natural E also contains organic selenium which is essential for the optimal activity of Vitamin E.Vitamin E in different horse feed materialsVitamin E is higher in fresh forage than in preserved forages. Vitamin E levels in commercial dry horse feeds are naturally very low due to processing and so Vitamin E must be supplemented. As Vitamin E is a relatively expensive feed ingredient the levels added may be on the low side.What is the difference between mg and IU?Sometimes Vitamin E is expressed as the weight in mg or as IU, which stands for International Units. The two are related but slightly different. The weight is the same for different forms of Vitamin E but the IU is how it works in the body or the activity. So for example, for 1 mg of synthetic Vitamin E the biological activity in the body would be equivalent to around 1.5 IU. Feeding 100mg of Vitamin E would therefore give you 150 IU of Vitamin E activity.