Optimum Nutrition offered soy protein is an excellent choice for individuals with high fitness aims. This supplement is plant based and from lactose, cholesterol & fat, thus it can also be taken by vegetarians and people who are allergic to milk protein. Intake of this protein increases stamina, and works great in repairing muscles. It works in the body by infusing it with all essential amino acids that create an anabolic environment in the body for muscle building and volumniation. Moreover, it strengthens the immune system and promotes cardiovascular health by reducing the risk of a heart stroke.