Protein shakes can be a great after exercise beverage or serve as a meal replacement. Julia Zumpano, a registered dietician from the Preventive Cardiology Program at Cleveland Clinic explains that the most important thing to consider is the nutritional make up of your shake. It should have enough protein, amino acids, fiber and not a lot of added sugar. Some protein shakes come ready-to-drink, which can be good option if you are on the go. Protein powders can be good on their own mixed with water or other base. You may choose to make them into a smoothie by adding other ingredients; it will keep you fuller, longer.