Thanks for the follow-up question.
Measured by a blood test, C-peptide level indicates how much insulin is released from the beta islet cells of the pancreas. C-peptide is released in equal amounts to the amount of natural endogenous (internal source) insulin. Bottled insulin does not contain C-peptide and using it suppresses natural insulin release.
There are some evidence that suggests early insulin treatment may keep beta cells producing insulin, at least for a while longer.
The normal fasting range of C-peptide is between 0.78 - 1.89 ng/ml (0.26 - 0.62 nmol/L SI unit). Lab standards may vary. A low C-peptide level suggests LADA (Latent Autoimmune Diabetes in Adults), also called type 1.5 diabetes.
C-peptide levels change continually in relation to a blood glucose load. After eating, the blood glucose level increases. Insulin would normally respond to bring the blood glucose level down. There would be a higher level of C-peptide in the blood.
What is the benefit of the C-peptide test?
Here is another discussion on managing LADA!
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