Protein Shakes have been used for decades by athletes, body builders, Regular Joes and soccer moms alike. There are a variety of shakes available on the market. They vary in price, ingredients and containers. The first thing to do when selecting a protein shake is to decide what you are really buying it for. In other words what is your goal. If you are lifting weights five hours a day then you're going to need a different mix than a person trying to lose twenty pounds.