Rice is not a complete protein, so other proteins must be consumed with it to form a complete protein; this can be done by adding rice powder to foods and drinks. There are a number of companies that manufacture protein supplements, including those made of rice; the rice supplement can be found in most local health or natural foods stores. Some people suggest reading independent customer reviews and learning which brands have the most favorable reviews before purchasing the product. If the taste of the powder is a problem, think about exploring the benefits of the protein via baked goods or flavorful smoothies