Alex Khilchenko: "What's you position about protein intake after training? All researches support it."
You are right, many researches support it. In the following answer I want to bring unorthodox point of view.
I'll break my answer to two parts:
- Post training protein intake
- Supplements in general
Post training protein intake
People often forget the big picture. Protein intake is only a small fragment from the puzzle. What if I tell you that after training protein intake during a training cycle will increase muscle growth by 2% and adding another sleeping hour will boost muscle growth by 10%? Additionally if your workout routine is badly planned and isn't supposed to get you anywhere, protein intake won't help, i.e. the mentioned 2% becomes 0%. Personally I think that protein intake receives much higher priority than it should. There are many things with a higher priority that aren't fulfilled. For instance: how can you think about post training protein intake when you daily menu isn't balanced?
Specifically, regarding the question whether you need post training protein intake can be checked very simply. Try stopping taking it for some period (for example: two month) and see whether you find any difference. If no differences observed (what happens to many trainees) you can stop taking (at least for now, on a later stage of you training another check would be recommended). If you do find any difference, than continue with post training protein intake.
Since we're talking about protein, and in most cases quick absorption is mentioned. This leads us to protein supplements and supplements in general.
Supplements in general
There are many supplement related researches. But these researches rarely publish all the relevant data. In order to demonstrate this, I'll bring two examples. First: how many people participated in this research? A research where five people tried out a new supplement can be a convincing evidence for its properties. Can you think of a new drug receiving an FDA approval after it was tested only on ten people? Second point: it's almost never written who financed the research. Did you know that more than 90% of researches of this type are financed by companies that want to sell this product (i.e. financing comes from an interested party and not from a neutral one). I'll use a quote from the net:"In year 2005, the price of manufactured worldwide supplements was four billion dollars. Someone has to buy them."