What is protein smoothie protein smoothie is a deliciously tasting high protein drink which contain natural strawberry and banana flavourings and real fruit pieces to provide a natural tasting fruit smoothie protein smoothie benefits each serving will provide over 18g of whey protein concentrate which will contribute to the growth and maintenance of muscle mass it is also low in carbohydrates and fat and provides just 98 calories per serving which makes it an ideal snack to consume at any