Crystalline fructose is obtained from starch through enzymatic hydrolysis, and purification. Crystalline fructose is metabolized faster than glucose in the human body, and is easily absorbed by the body. It does not depend on insulin and has little effect on blood sugar. It is suitable for supplementing energy in patients with glucose metabolism and liver insufficiency. At the same time, it can also promote the reproduction of beneficial bacteria and prevent dental caries. Therefore, crystalline fructose is an ideal sweetener for diabetics, obese patients and children's food.