The C-peptide test measures levels of the protein fragment C-peptide in the blood, generally found in equal amounts to insulin. Therefore, the level of C-peptide estimates how much insulin is being made in the body. Insulin is a hormone that helps the body use and control glucose levels.
The C-peptide test can be used to indicate a number of diseases and disorders but the primary use in the diagnosis of hypoglycemia (low blood sugar). C-peptide levels can also be used to establish whether Type 1 diabetes or Type 2 diabetes is present. An individual with Type 1 diabetes has a low level of insulin and C-peptide. An individual with Type 2 diabetes has normal to high levels of C-peptide and insulin.
The material on this page is educational and does not constitute medical advice, diagnosis or treatment. Please consult your
physician if medical advice, diagnosis or treatment is needed. Health screening lab tests may or may not alert you and your
doctor to serious medical conditions and are not intended to be a substitute for a physician's examination.
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