The production and utilization of blood sugar in normal people are in a state of dynamic balance and maintain at a relatively stable level, because the source and destination of blood sugar are roughly the same. Specifically, the sources of blood sugar include: ① food digestion and absorption; ② Glycogen stored in the liver is decomposed; ③ Conversion from fat and protein: in the human body, sugar, fat and protein can be converted to each other. The process of conversion from fat and protein to sugar is called gluconeogenesis. The route of blood sugar includes: ① oxidation and conversion into energy; ② Transformed into glycogen and stored in liver, kidney and muscle; ③ It is converted into other nutrients such as fat and protein for storage. The important organs for regulating blood sugar in the human body include: ① liver: regulating blood sugar by storing and releasing glucose; ② Nervous system: regulate blood sugar by influencing food intake, carbohydrate intake, digestion, utilization and storage, and also indirectly affect blood sugar through endocrine system; ③ The endocrine system secretes various hormones to regulate blood sugar. The liver, nervous and endocrine systems work together to maintain the stability of blood sugar.

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