The body will use protein for energy if there is not enough carbohydrate and fat present. Otherwise it will be used for its other unique features. The amount of protein needed by healthy people is small. The amount of protein an individual needs is dependent on their body weight. Foods from the meat group have about 7 grams of protein per 1 ounce serving.
Some plant foods are high in protein.
Most adults need 2 to 3 servings every day of milk and 2 to 3 servings of lean meat or meat substitute. A serving can be 2 to 3 ounces. It is easy to get enough protein from most diets. Even vegetarians can get enough protein, especially if they plan carefully. In fact, most Americans eat too much protein.