Usn casein night time protein is a gradual release micellar casein with added aminogen for optimalprotein digestibility and absorption the slow digestion and absorption of amino acids hasbecome an essential and highly beneficial element of recovery taken primarily before bed or prior to periods where your body typically is subjected to reduced food intake casein has shown to help spare and protect lean mass selecting the highest grade of micellar casein usn has set a new standard in slow ab