500 grams.a day of protein is also very taxing on kidneys.
The sad thing is you don't need anywhere near that, if he kept it between. 8-1g per pound of body weight and filled the rest of his calories with carbs he'd be way better off. Smart coaches like Patrick Tuor knows this and has been applying this to his athletes, as well as George Farah, all that protein is pointless and just causing digestive distress, high levels on ammonia, pressure on the kidneys to filter all that excess protein, Cutler also had it right super high carb, moderate protein.