Essential Minerals is a free-choice mineral supplement providing several important minerals, designed especially for horses in selenium deficient areas. Selenium is extremely important for immunity and muscle function. In areas that are the selenium deficient, the horse owner must provide a source of selenium in order for the horses to receive adequate levels. The ideal method for the consumption of selenium is through the supplementation of organic selenium daily. However, daily supplementation is not practical for every horse owner. For those that can’t supplement their horses on a daily basis the next best thing is a salt controlled free-choice mineral supplement. For these horse owners we have developed essential minerals. It provides 3 mg of selenium per day for the average horse that consumes 1 ounce of salt a day. Ingredients: Salt, Mono-dical Phosphate, Iron Sulfate, Copper Sulfate, Zinc Sulfate, Manganous Oxide, Magnesium Oxide, Mineral Oil, Iron Oxide, Sugarmate, Sodium Selenite, Cobalt Carbonate, EDDI. Feeding Instructions: Allow horses free access to this product. The formulation will limit consumption to approximately one ounce per day. The product is safe at 10 times that amount. If possible, protect the product from rainfall.