Man, your english sucks, your native language. The point of studies is monitoring a controlled group of people. It is not subjective, so there is no "im pretty sure..". They can determine if it is a placebo, if it works, if it does not work. I honestly do not even know what are you trying to say because you can not put a sentence together which would make sense. Honestly, if you are not fake flagging, learn some fucking spelling.