Postprandial C-peptide levels are thought to reflect the peak insulin secretion triggered by both postprandial hyperglycemia and incretin effects, in contrast to fasting C-peptide levels. Besser et al. have shown that in patients with type 1 diabetes (T1DM), the C-peptide level 90 minutes after a meal is highly correlated with the peak C-peptide value and the area under the curve (AUC) during a mixed-meal tolerance test, which is considered the gold standard for measuring endogenous insulin secretion in T1DM. Interestingly, studies have also found that the postprandial C-peptide index is more strongly correlated with insulin-producing cell mass in humans compared to fasting C-peptide index. These findings suggest that postprandial C-peptide may more accurately reflect the maximal functional capacity of insulin-producing cells.
Test Type: Blood
Reporting: Same Day
Free Home/Office Sample Collection
Fasting: Fasting is not mandatory
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One Prick Sample Collection Policy
Yes. Book home collection when ordering online or call our team. Trained phlebotomists visit your address at the scheduled slot.
Most routine tests are reported same day after sample validation. Specialized tests may take longer — see your booking confirmation.
CoreLab follows NABL-aligned quality-assured pathology processes with structured SOPs, trained collectors, and MD pathologist oversight.
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