We all know that more than half of our bodies are made up of water. But did you know protein makes up about 17% of our bodies? Unlike some nutrients such as fats and carbohydrates, all of the protein in our bodies has a function and is not stored. Remember this fun fact when planning a healthy, protein-packed dinner to satisfy those hunger pangs. Protein is essential to life, and each gram of protein contains proteins that fuel our bodies daily.