Nitro is specifically formulated prerace electrolyte supplement with probiotics for performance horses to help maintain normal gastric pH and support digestive functions, contains a source of live (viable), naturally occurring microorganisms. Nitro contains octacosanol to help improve endurance, enhance performance, to strengthen muscles and improve oxygen utilization. Nitro is designed to give your performance horse the prerace boost needed to perform at its optimum level and recover quickly after performance. 4 doses per tube