Eating a breakfast that is high in protein has many benefits for the body. Protein makes your stomach feel full and is typically digested slowly, so eating a breakfast that is high in protein will jump start your metabolism after being asleep all night and make you feel fuller throughout the day. Protein is used by the body to strengthen muscles and cartilage, and is necessary to maintain healthy hair and nails. Tissues that are damaged from physical activity use protein to heal. Here are a few steps on how to add protein to breakfast.