How so? A guy his size can put away that much protein fairly easily. Heck, I tend to eat 275-300 grams of protein per day with little problem; and I'm nowhere near his size.
It's not whether or not he can eat that amount, it's whether or not his kidneys can survive on that amount in the long run.
As a matter of fact, I will retract my above statement and make it slightly more elaborate.
The human body isn't made to sustain a 5'8 300 pound man that eats like a morbidly obese human being. The Kidneys are pretty delicate in that large amounts of protein consumed can cause serious damage. I call bullshit on his claims, because most human beings would suffer from acute renal failure due to kidney stones following such a diet. At the very least, he is certainly in line for a kidney stone or two.
Have you every tried consuming 500 grams of protein daily for a year? Give that a try and let us know how that works out for you.
Also, I could be mistaken, but the common recognized value for caloric intake that translate into weight gain is 1 pound = 3,500 calories. Assuming Jay burns half of the calories he takes in daily (Highly doubt), can he be gaining a pound every day?
This is speculation on my part, but I still call bullshit.
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