In one aspect, the present invention is directed to isolated soy protein compositions and to the preparation of the isolated soy protein compositions. In another aspect, the present invention is directed to beverage compositions that contain the isolated soy protein compositions and to the preparation of the beverage compositions that contain the isolated soy protein compositions. The beverage is selected from the group consisting of an aqueous acidic liquid or a liquid milk product. The beverage may be prepared and consumed as a cold beverage or a hot beverage or at any temperature of comfort between a cold temperature and a hot temperature. Cold beverages include juices, energy drinks, iced teas, iced coffees, etc. Hot beverages include lattes, mochas, espressos, cappuccinos and teas.