The reason for putting maltose inside soymilk is to provide a sweetening effect to the soymilk. Soymilk itself has a monotonous taste and contains some bitter substances, which may affect some people's acceptance of it. Adding the right amount of maltose syrup can neutralize the bitterness of soymilk and make it taste smoother and sweeter. In addition, the proteins and a variety of enzymes in soymilk will hydrolyze maltose, and these substances can increase the taste and nutritional content of soymilk.

In short, maltose syrup is added to soymilk mainly to increase its taste, and for some people who should not consume too much sugar, it is recommended to consume in moderation or not add maltose syrup.