Scientific studies into nutrient timing and protein types have provided us with tools to maximize training effects. Our PRO LONG 100% casein protein is a slow-digesting type (as opposed to fast whey proteins) that provides a sustained release of amino acids into the bloodstream up to 7-8 hours. It makes casein ideal when meals are too far apart for some reason, or before going to bed. If you use pre- and intra-workout nutrition (including protein or amino acids), it may be preferable to include casein as the post-workout protein. The slower digestion makes casein more anti-catabolic than fast proteins and the amino acid utilization from the protein is more efficient. Casein is high in the crucial branched-chain amino acids (BCAA's) and very high - higher than whey - in L-glutamine, a practically essential amino acid very important to muscle building. DIRECTIONS: PRO LONG is ideal when meals are too far apart for some reason, or before going to bed. If you use pre- and intra-workout nutrition (including protein or amino acids), it may be preferable to include casein as the post-workout protein. Typically protein intake from shakes is limited to 50% of total daily protein consumption - use accordingly. Mix 1-2 servings with any liquid to prepare a shake. Use 350 ml liquid per scoop and shake vigorously!