This specific ones more of a misunderstanding really than a myth, lots of guys apparently are convinced if they visit a gym and exercise for some time then consume a protein shake they currently have all things in place to be able to gain muscle. The fact is, even though whey protein shakes are a good addition to your diet regime, you simply can't just use them on their own to build muscle tissue.
An organized and balanced diet plan that is loaded with protein is the main element here. The majority of nutritionalists recommend a ratio of 40% carbs 40% protein and 20% fats (healthy fat). So this is a good method to abide by. Simply use focus as a supplement to your diet as opposed to a justification not to change your diet!