Fitness tips - protein

I think all of you already do fitness. Everyone from any place of the world.
But, many person ask about their body. Why although they train his body, it doesn't grow big?
It because their body is lack of protein.
Protein is very important for our body because it repairs our muscle so it can grow bigger and bigger.
After you do fitness, you must consume protein.. I guarantee that you will have great body.
I recommend prolab and ultimate nutrition like whey protein and many other things...