Learn The Best Muscles Building Foods Proteins are actually considered as the muscle's building blocks. Not all muscle building foods hold enough proteins and their protein completeness also varies. Protein shakes should contain about 25 - 30 grams per serving and should be used to supplement a meal if necessary. If you are eating 3 large meals a day then it's time to start eating 5 -6 smaller meals. Protein shakes will contain about 25 - 30 grams per serving and should be used to supplement... read more