Your body's protein needs depend on your gender, body weight, age, physical activity level, and other factors. All other things being equal, men need more protein than women. According to the Institute of Medicine, the recommended daily allowance for an average adult man is 56 grams per day. Adult women need 46 grams, teenage boys 52, and infants 10.
For example, a typical day of protein intake of 50 grams would include: Chicken, 3 ounces, 21 grams; two large eggs, 13 grams; 2 tablespoons of peanut butter, 8 grams; and 8 ounces of yogurt, 8 grams.
More specific recommendations, based on body weight, call for adults to get about 8 grams of protein for every 20 pounds of body weight.