An aqueous solution of a soy protein product having a protein content of at least about 60 wt% (N x 6.25) d.b. which is completely soluble in aqueous media at a pH of less than about 4.4 and heat stable at that pH range is adjusted in pH to a pH of about 6.1 to about 8. The resulting product is further processed by drying the product, recovering and drying any precipitated soy protein material, heat treating and then drying the product, or heat treating the product and recovering and drying any precipitated soy protein material.本發明提供一種具有至少約60重量%(N x 6.25)d.b.之蛋白質含量的大豆蛋白質產品的水溶液，該產品在pH小於約4.4之水介質中完全可溶及在該pH範圍為熱穩定，該水溶液之pH調整至約6.1至約8之pH。藉由乾燥該產品，回收及乾燥任何沉澱之大豆蛋白質物質，加熱處理及接著乾燥該產品，或加熱處理該產品及回收及乾燥任何沉澱之大豆蛋白質物質而進一步處理所得產品。
