building blocks of proteins are amino acids, of which about 20 have an important role in human metabolism. Each protein in the body is made from a combination of certain amino acids. Some of them can be synthesized from other amino acids, and some must be obtained from our diet.
the latter are called essential amino acids. proteins in foods contain different amounts of acid. Animal foods, including dairy products, contains all the essential amino acids, and are known as complete proteins. Plant foods, unlike almost always lacking, or are low in one or more essential amino acids. This is not a problem, provided a different plant foods are consumed throughout the day. For example, beans are low in the amino acid lysine, but if you eat your bread with hummus spread, or the lens you will get your lysine from this source. This is sometimes called "complementary proteins." The exception is soy protein.
This does not contain all the essential acids and, therefore, often used in protein powder and is an alternative to infant formula for infants intolerant to cow's milk. If you are a vegetarian, soy and soy products like tofu and tempeh are smart additions to your diet. We must also pay attention to other nutrients that come with the protein in food. Many animal-sourced, protein-rich foods are also foods rich in fat and more fat is saturated.
Only a few currently popular high-protein diets recognize this and make specific recommendations on the type of fat. The vast majority of diets are low carb pushed perfect no matter what the quality of food that remained. This is exactly the same mistake as they made early in the era of low-fat dietary recommendations. We must stop these silly, one-eyed child to the wrong one macronutrient for all our diseases.