On the other hand, casein takes about 80 % of the milk protein and unlike whey protein it is very slowly digested.Casein proteins offer a much slower absorption
rate of around 7 - 8 hours and continue to
constantly provide amino acids into the blood stream for this time.Another thing that makes casein a good protein for athletes is the fact that micellar casein proteins contain
high percent of amino acid glutamine (which is vital for muscle repair and cell volumization),
growth factors, and properties that support the immune system.