When researchers at a world-renowned clinic tested a combination of whey + casein protein, as found naturally in milk protein, they discovered that the two protein sources work together to build lean muscle.
100% whey protein in isolation only gets you so far… it can spike protein synthesis with an influx of amino acids, but quickly returns to baseline, leaving you where you started.
Enter casein, a slower-digesting protein that’s typically consumed for its anti-catabolic properties as it promotes a steady release of amino acids over time. Casein actually results in more retention of ingested protein than whey!
Whey protein hits the bloodstream at a fast rate, but it is casein protein that has been shown to create the strongest leucine balance. It only makes sense to consume them together.