Soybeans are a great quality protein because their amino acid content is similar to that in meat, and they are a good source of fiber, minerals, and complex carbs. Isolated soy protein is a protein that is purified from high quality non-GMO defatted soybean flakes, which make its protein content as high as 90% and it does not contain other carbohydrates and fats. Because of this, it has a neutral flavor and will cause less flatulence than soy flours.
Isolated soy protein is a complete protein since it provides all of the essential amino acids for human nutrition. It is one of the least expensive sources of dietary protein. And can be important to many vegetarians and vegans. Other plant protein does not contain the complete nutritional value that soy does.