Slow-release micellar casein formula that delivers amino acids and supports muscle rebuilding over several hours.
 
R1 Casein is a slower digesting protein compared to whey protein. As a slower digesting protein R1 Casein works well between meals and at bedtime when more sustained amino acid delivery is desired.
 
The most important muscle building and regeneration processes occur at night while you're sleeping. Therefore, it is necessary to provide your muscles with the nutrients that are needed for these processes. Casein is a slow-digesting protein that breaks down more slowly, delivering its amino acids over several hours.
 
R1 Casein works best in conjunction with a fast acting source like R1 Protein or R1 Whey Blend. Use R1 Protein or R1 Blend during the day and take R1 Casein before going to bed to help feed your muscles while you sleep.