MuscleTech® introduces an innovative hybrid formula, Muscle Builder PM. A nighttime recovery and musclebuilding supplement. Muscle Builder PM features clinically studied ingredients shown to help athletes build muscle and recover faster from intense workouts. Muscle Builder PM also boosts free testosterone levels to optimize testosterone-to-estradiol ratio and provides the ideal combination of popular nigthttime aid ingredients. With the powerful and new botanically derived musclebuilder CinDura®, Muscle Builder PM is equipped to provide athletes with maximum results. CinDura® is scientifically shown to build more lean muscle, by working to facilitate muscle energy production and promoting muscle growth while preventing muscle breakdown.