Two hours after meal C-peptide 1.25nmol/ml, the value belongs to the normal range, but also need to be combined with the blood glucose value, fasting C-peptide, C-peptide secretion curve and other comprehensive assessment. C-peptide can reflect the secretion function of pancreatic islet β-cells in the patient’s body. Under fasting condition, the normal reference range of C peptide is 0.3~1.3nmol/ml, and the secretion reaches the peak 0.5~1.0 hours after oral glucose intake, and the peak value is about 5~6 times of the fasting value, and it gradually returns to the fasting level in 2~3 hours. Therefore, the result of C-peptide 1.25nmol/ml belongs to the normal range, but it needs to be combined with blood glucose, fasting C-peptide, C-peptide secretion curve, etc. to confirm the diagnosis. It is recommended to consult your doctor for C-peptide results.