The maximum rate at which a human body can, in theory, absorb whey protein is 8-10 grams an hour. So that 30 gram protein shake your drinking might be digested more quickly than that but it will take time for it to be fully absorbed. You could, in fact, be absorbing protein all day long which is actually why it’s so effective as it is constantly fuelling your body and releasing energy. The key to more effective absorption is to combine the protein with digestive enzymes.\r