Proteins serve several primary functions in the body, including supporting growth, repairing tissues, and facilitating metabolic processes. They are essential for building and repairing muscles, making them vital for athletes and active individuals. Proteins also play a role in the production of enzymes and hormones, influencing metabolism and various bodily functions. Additionally, they contribute to immune system health by creating antibodies that fight infections. Including sufficient protein in the diet is crucial for maintaining overall health, supporting recovery, and achieving fitness goals, regardless of age or activity level.