It is inoculated with beneficial bacteria to make it meaty-tasting and chewy. With respect to your question about vegetable protein, soybeans are the only vegetable that by itself offers a complete protein profile. Soy protein is of the highest quality, equal to that of meat and dairy products, but without the cholesterol and saturated fat. It can be the sole source of protein, without causing any nutritional imbalance. Our body breaks down protein into individual amino acids, which form helpful antibodies and enzymes for our bodies.
Amino acids are necessary for proper growth, development, health and maintenance.
Of the twenty-two amino acids we require, our body produces only fourteen. These are called nonessential amino acids. The remaining eight are called essential amino acids, which must come from the foods we eat. Soy protein provides all eight of these amino acids, making it a complete protein. Besides having a higher quality protein, soybeans also have a higher amount of protein than other beans.