Your not serious are you? If you are 100 % Natural and you are training 2 hrs a day in the gym your a complete fool, especially on low carbs!
I competed as a natural bodybuilder for many years, 8 to be exact, and most of my workouts were never over 45 minutes unless I was doing cardio.
Any top natural bodybuilder will tell you after 45 minutes your natural testosterone, and gh levels start to decline .After 60 minutes they drop even more.
This will lead to the release of cortisol.
Paco can train for hours if he wants, because he on a ton of gear, but even for him that is stupid.
Nobody, I mean nobody needs more then 45 minutes in the gym when it comes to weight training.
I did back Yesterday, I did 12 sets, and it took me 35-40 minutes tops.
I am so glads you have 2 hours a day to spend in the gym, I sure dont.
Growth is done out of the gym not in the gym