Eating excess protein above your energy needs without including extensive strength training activities will only increase your calorie intake and lead to fat gain, not muscle. Americans consume more than the Recommended Dietary Allowance of protein for adults of 0.8 grams of protein for each kilogram of body weight. For example, a 200 pound male needs 73 grams of protein per day, which can easily be achieved by eating the amount of protein in 3 chicken breasts without consuming any other source of protein throughout the day including: beans, eggs, milk products, nuts, grains, soy products, and lean meats/fish.