Normal blood glucose, low C-peptide curve may suggest that the islet cells are destroyed, reflecting the islet function is insufficient, usually pay attention to monitoring blood glucose, if necessary, can follow the doctor’s advice to take hypoglycemic drugs. C-peptide and insulin are both isomolecular peptides split from insulinogen, C-peptide is not inactivated by hepatic enzymes, and is not affected by insulin antibody and exogenous insulin in serum. C peptide concentration can reflect the reserve function of pancreatic β-cells. C peptide levels in type 1 diabetes mellitus are reduced in both fasting and postprandial periods, which indicates poor reserve function of pancreatic β-cells. Normal blood glucose indicates that the condition is under good control, and a low C-peptide curve indicates that the islet cells have poor reserve function, so you need to monitor your blood glucose and take glucose-lowering drugs such as acarbose regularly as prescribed by your doctor. It is also necessary to pay attention to the reasonable diet, eat less and more meals, reduce the intake of sugary foods, to maintain the stability of blood glucose level. The use of medication should be under the guidance of a doctor.