Many horses need more vitamin C than they can make themselves or get from feed and forage - especially seniors, those in heavy work, those with respiratory conditions, and any horse that has been stressed. Vitamin C by SmartPak contains 7,000 mg of pure vitamin C with natural, sugar-free sweeteners. Your horse will love the fresh orange flavor! View our Antioxidant Supplement Comparison Chart SKU Number: 17176. Sold by SmartPak. Found at www.smartpakequine.com.