Protein shakes can help you gain muscle mass when combined with exercise, but they won’t make you “thick” or bulky on their own. Protein shakes contain a variety of proteins and other nutrients, which can help build and maintain muscle tissue when consumed in combination with regular exercise. Protein shakes can also help you meet your daily protein needs, which may help you build muscle and recover from exercise. However, it’s important to remember that protein shakes alone won’t make you thick or bulky. To really build muscle and change your body’s shape, you need to focus on a regular exercise routine that includes strength training and cardiovascular exercise.