Vita Flex Pro Lactanase helps maintain energy for peak performance in horses in competition or workouts. This unique formula supports optimal muscle function and metabolism in horses. Lactanase is a unique supplement designed to supply key ingredients in the aerobic energy production of muscle cells. By increasing the capacity and efficiency of aerobic energy production it will help support stamina and endurance. Lactanase supplies antioxidants that help reduce oxidative stress associated with strenuous exercise. It supplies ingredients involved in the conversion of products of glycolysis (pyruvate) to acetyl coenzyme A, a key to efficient energy release. The formula contains no show prohibited substances. Please check with your association for testing rules and regulations.