(1) taste: sweetness is one of the indicators of many foods, in order to make food, drink palatable feeling, you need to add a certain amount of sweetener.
(2) the regulation and enhancement of flavor, generally require sweetness in the pastry; in the beverage, the flavor adjustment has a "sugar acid ratio" one. Sweeteners give the product good flavor and fresh taste.
(3) Flavor formation, sweetness and the flavor of many foods are complementary to each other. The flavor of many products is a combination of flavors and sweeteners, so many foods are sweetened.