The document discusses protein and its importance for the human body. It states that protein is found in foods made from meat, poultry, seafood, beans, peas, eggs, soy, nuts and seeds and is used by the body to build tissues, enzymes, hormones and other important structures. It recommends that children aged 4-8 eat 4 ounces of protein per day, while boys and girls aged 9-13 should eat 5 ounces, and provides examples of what counts as 1 ounce of protein, such as 1 ounce of meat or 1 egg.