The highest PDCAAS rating is 1, which represents protein that can be completely absorbed and utilised by the body.Among various foodstuffs, soya beans have the highest protein content.

• 美国食品及药物管理局在2001年确认大豆浓缩蛋白质为优质蛋白，其PDCAA值为1，即能被人体百份百吸收和消化。