Protein shakes are becoming increasingly popular for those who want to shed off some weight because drinking protein shakes encourage weight loss by curbing one’s appetite. Just having smoothies to replace a meal also cuts your calorie intake. Protein also helps build your muscles. But do remember that relying solely on protein shakes as meal replacement will not be good for you. Nothing beats a healthy meal every time; if you are planning to start on protein shake diet, make sure to get advice from your doctor or nutritionist, especially if you have a medical condition.