Kentucky Performance Products Elevate Se Vitamin E & Selenium Powder Horse Supplement, 2-lb jar; Give your horse powerful antioxidant support with Kentucky Performance Products Elevate SE Horse Supplement. Antioxidants help limit damage caused by everyday oxidative stress. Elevate SE provides natural vitamin E and selenium to support normal muscle and nerve function and promote a healthy immune system. This supplement was designed to help you increase your horse’s vitamin E or selenium intake without causing a dietary imbalance. It’s ideal for areas with selenium-deficient forage to aid with cellular function and help prevent white muscle disease.