Soy Proteins contain a relatively high amount of BCAA and arginin, but it has a low concentration of methionine.
It has been shown to enhance thyroid hormone output, which helps increase the metabolism and aids in fat loss. Soy proteins contain isoflavones, which may have some health promoting benefits as anti-oxidants and anti-carcinogenics. Soy proteins are also high in many vitamins and minerals. The isoflavones found in the soy can help lower cholesterol and triglyceride levels.
It contains the complete spectrum of amino acids and is a good protein source for people who don't consume animal products.