also known as C peptide in Serum or Plasma, 1.5 hours post dose glucose
The C-Peptide blood test helps evaluate how much insulin your body is producing naturally by measuring C-peptide, a substance released in equal amounts to insulin. This makes it a powerful tool for understanding blood sugar imbalances and identifying whether insulin levels are too low, too high, or appropriately regulated. Because injected insulin does not contain C-peptide, this test is especially valuable for individuals who use insulin medication, allowing clinicians to distinguish between insulin made by the body and insulin taken externally. It is commonly used to investigate the underlying causes of abnormal blood sugar levels and to support accurate diagnosis and treatment planning. What Is Included In This Test? This test measures the level of C-peptide in your blood, which directly reflects how much insulin your pancreas is producing. Your results can help: Assess pancreatic insulin production Differentiate between type 1 and type 2 diabetes Identify causes of low blood sugar (hypoglycemia) Evaluate excessive insulin production Guide treatment decisions for blood sugar disorders Because insulin and C-peptide are released together when insulin is made naturally, this test provides a clear and reliable picture of endogenous insulin activity. Who Should Consider This Test? This test is ideal for individuals who need deeper insight into insulin production and blood sugar regulation. You may benefit from this test if you: Experience unexplained low or high blood sugar levels Have diabetes and want to evaluate natural insulin production Use insulin therapy and need to distinguish between injected and body-produced insulin Are being evaluated for hypoglycemia or hyperglycemia Need diagnostic clarification for a blood sugar or pancreatic disorder Early and accurate assessment can support more targeted treatment and better long-term metabolic outcomes. Convenient, No-Appointment Testing To complete your test: Order online through our website Use the lab locator to find a nearby testing location Walk in; no appointment required Access your results securely in your HealthLabs.com account within one to three business days 110% Price Guarantee! If you find the same test for a lower price from a comparable provider, contact us. We not only match the price, we beat it by an additional 10 percent of the difference.