In the stomach, this acid functions to kill bacteria in foods, to soften foods and to convert the inactive enzyme pepsinate into its active from pepsin, to begin the digestion of protein.

• 在胃里，这种酸的作用是杀司食品的细菌，使食物软化，把钝化的胃蛋白酶原转化为有活性的能消化蛋白质的胃蛋白酶。