In hot conditions, especially beyond a two-hour effort, your core temperature can increase substantially, causing profuse sweating. The ensuing fluid depletion forces your heart to work harder and slows metabolic reactions necessary for efficient fuel transport. This means decreased athletic performance and increased possibility of dehydration. Liquid Endurance's glycerol component increases blood volume and cellular/intracellular fluid storage capacity, giving you extra fluid reserves. L-carnitine and vitamin B6 complement glycerol in supporting efficient energy metabolism for fatty acids, imperative in endurance exercise. Test it in training, and then see your times drop when it counts. Don't race in hot weather without Liquid Endurance. One bottle contains 24 servings.