“But not all protein is created equal. Different protein sources do not have the same AA composition, and different combinations of the twenty AAs have unique properties and roles in the body. This is entirely overlooked in food-packaging requirements. Even the RDA doesn’t recognize the meal requirements of different AAs. No wonder so many of us aren’t taking in the quality proteins our bodies need. There are twenty AAs, nine of which are designated “essential,” which means they must be obtained through diet or supplementation because the body can’t make them independently.”