Dietary protein refers to proteins that are consumed through food sources, rather than being produced internally by the body. Protein is an essential macronutrient required for growth and repair of tissues in the body, as well as for various metabolic processes. Dietary protein can come from a variety of sources such as meat, poultry, fish, eggs, dairy products, legumes (e.g., beans, lentils), nuts, seeds, and even some vegetables like broccoli or spinach. The body breaks down these proteins into amino acids which are then used to build new tissues, enzymes, hormones, and other essential molecules in the body.