An athlete"s worst nightmare is that his hard-earned muscle is being broken down in his sleep.Pure CaseinTM Protein, has a long-term effect in suppressing protein breakdown which your body needs to sustain for six to eight hours during your sleep without food.In fact, a total release of amino acids in the bloodstream can last as long as 7 hours after ingestion of casein protein!Whey Protein, in comparison, reaches a peak in blood amino acids and protein synthesis in about forty minutes and the total release ends in about an hour.In other words, it"s an awesome muscle-sparing protein.