The bigger you are the higher your protein digestion, simply because of a larger surface area in your intestines. Also if you have been consuming large amounts of protein for a long time, your body's ability to process protein increases. A good bu t gross test to see if your are consuming to much protein is to have a look next time you deficate. If you pooh floats then all of the nutrients have been absorbed, where as if it sinks your stool is still pact full of undigested proteins, carbs, and fats. Bad gas is also a sighn of protein overload.