These are the reference ranges for C-Peptide, Ultrasensitive:
Adults 8:00 a.m. fasting: 0.4 - 2.1 ng/mL
2 Hours Post Prandial (Sustacal): 1.2 - 3.4 ng/mL
2 Hours Post Glucose: 2.0 - 4.5 ng/mL
This test measures the level of C-peptide. Measuring C-peptide is an accurate way to find out how much insulin your body is making.
Insulin is a hormone that your pancreas makes. It helps blood glucose (blood sugar) get into your cells, where it can be used for energy. This helps keep your blood glucose at healthy levels.
During the process of making insulin, your pancreas produces C-peptide. C-peptide and insulin enter your bloodstream at the same time and in equal amounts. C-peptide doesn't affect your blood glucose levels, but it stays in your blood longer than insulin, so it's easier to measure accurately.
A C-peptide test can provide important information to help understand, monitor, and/or treat disorders that involve how well your body makes insulin, such as hypoglycemia (low blood sugar) and diabetes.
References:
Leighton E, Sainsbury CA, Jones GC. A Practical Review of C-Peptide Testing in Diabetes. Diabetes Ther. 2017 Jun;8(3):475-487. doi: 10.1007/s13300-017-0265-4. Epub 2017 May 8. PMID: 28484968; PMCID: PMC5446389.
What does it mean if your C-Peptide, Ultrasensitive (Endocrine Sciences) result is too high?
These are the reference ranges for C-Peptide, Ultrasensitive:
Adults 8:00 a.m. fasting: 0.4 - 2.1 ng/mL
2 Hours Post Prandial (Sustacal): 1.2 - 3.4 ng/mL
2 Hours Post Glucose: 2.0 - 4.5 ng/mL
A high level of C-peptide usually means that your body is making too much insulin.
Conditions that cause high insulin levels include:
- Type 2 diabetes
- Cushing's syndrome
- Insulinoma, a tumor in your pancreas
- Kidney failure
- A low level of potassium in your blood
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What does it mean if your C-Peptide, Ultrasensitive (Endocrine Sciences) result is too low?
These are the reference ranges for C-Peptide, Ultrasensitive:
Adults 8:00 a.m. fasting: 0.4 - 2.1 ng/mL
2 Hours Post Prandial (Sustacal): 1.2 - 3.4 ng/mL
2 Hours Post Glucose: 2.0 - 4.5 ng/mL
A low level of C-peptide may mean your body is not making enough insulin.
Conditions that cause low insulin levels include:
- Type 1 diabetes and, in some cases, type 2 diabetes
Taking too much insulin to treat diabetes
- A severe infection
- Addison disease
- Liver disease
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