Raipizo,
Guy in link fails to tell the supplements he uses, LOL. Like Winny and Nandro.
Bodybuilders eat like CRAP most of the time until a few months out. Then they clean up the diet and cut the amount they eat. That is also when they tend to use things like protein powder. Or when cycling- your body will use the excess protein for muscle when you are on. Get the protein without the calories.
Just go to a vegan site about what needs to be combined with what to make a complete protein. It is sort of crap. Because you do not need to eat that combo at the same time but most already do anyway. Like beans and tortillas. Burrito. I like meat so I don't even worry about it.
First guy that I know of to say supplements were a joke- Arthur Jones. He was probably not the first either.