Nano-E uses advanced nanotechnology to create a rapidly available and absorbed source of vitamin E that enables administration to be timed to provide peak antioxidant protection to performance horses. Why should I use Nano-E for my horse? Vitamin E antioxidant supplement for all types of horses. Natural-source vitamin E proven more effective than synthetic vitamin E. Rapidly available so administration may be timed to provide peak antioxidant protection. Reproductive benefits for breeding stallions, and pregnant and lactating broodmares.