Bulk Extreme by MusashiMusashi Bulk Extreme Bulk up fast with Musashi Bulk Extreme! This nutritionally balanced formula contains instantiated whey protein concentrate and instantiated whey protein isolate, both of which improve lean mass and muscle strength. These two high quality protein sources contain the branched chain amino acids leucine, isoleucine and valine which aid in the building and repair of healthy muscle tissue. Branched chain amino acids also reduce the