Crystalline fructose is a kind of surrogate sugar, which is the most chemically active six-carbon monosaccharide among sugars, and its sweetness is 1.2-1.8 times that of sucrose, which is not only sweet, but also has a unique flavor. Crystalline fructose is a monosaccharide, isomer of glucose, contains 6 carbon atoms, belongs to a kind of sugar substitute. This type of fructose is very sweet, about 1.2-1.8 times sweeter than sucrose, and can be mixed with other sweeteners. In addition, crystalline fructose has a unique flavor, low calorific value, faster metabolism than glucose in the body, easy to be absorbed and used by the body, and does not depend on insulin, the glycemic burden is small. After properly adding crystalline fructose to food, not only will it not cover the other flavors of the food, but also can better maintain the original flavor of the food. Although compared to other sugars, crystalline fructose insulin effect is relatively small, but still has a certain amount of calories, if consumed in excess, it is easy to lead to an increase in body fat content, which in turn triggers obesity, so it is recommended that they should be controlled at ordinary times, do not over-consumption.