J strong is on the right track.Casein is chalked full of a nice array of slow-release aminos...It has anti-catabolic properties due to it's slow release into the blood stream,and is actually superior to whey in this regard.The solution is to run both together as whey induces hyperaminoacedemia(anabolic)but is in and out of the blood stream rapidly,while the casein provides that slow,steady release of amino's over a several hour time span and makes up for whey's inherant weakness.