C-Peptide Post Prandial Serum Test
Short Name: C-Peptide PP Serum Test
Also known as: C-Peptide Level Test, Postprandial C-Peptide Test, Serum C-Peptide After Meal
C-Peptide Post Prandial Serum Test test available at DNA Labs India for ₹1,229. Uses Chemiluminescent Immunoassay on Serum samples. Results in Reports are available within 24 hours via online portal, email, or WhatsApp.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr Ramarao Paidisetty
Consultant Biochemist · Reg: 21504
Last reviewed: September 7, 2026
Overview
To measure C-peptide levels after a meal for assessing insulin production, diagnosing diabetes, and monitoring treatment efficacy.
- Test Code
- 365
- CPT Code
- 84681
- ICD Code
- E11.9
- Price
- ₹1,229
- Sample Type
- Serum
- Result Time
- Reports are available within 24 hours via online portal, email, or WhatsApp.
- Fasting Required
- No
- Method
- Chemiluminescent Immunoassay
Sample Collection
Eat a standard meal and wait exactly 2 hours before sample collection. Avoid strenuous activity and inform the healthcare provider about any medications.
Method: Venipuncture after a meal
Laboratory Analysis
A healthcare professional will draw a blood sample from a vein in your arm using a sterile needle.
Report Delivery
Apply gentle pressure to the puncture site with a cotton ball to stop bleeding. Avoid heavy lifting for a few hours.
Timeline: Reports are available within 24 hours via online portal, email, or WhatsApp.
Patient Instructions
About This Test
Who Should Get This Test
To measure C-peptide levels after a meal for assessing insulin production, diagnosing diabetes, and monitoring treatment efficacy.
How to Prepare
- Consume a regular meal as per your diet
- Wait for 2 hours after starting the meal
- Stay hydrated and avoid excessive physical activity
- Provide the blood sample at the scheduled time
Doctor's Notes
Reviewed by Dr Ramarao Paidisetty — MBBS, MD (Biochemistry) · Reg. No. 21504
"The C-peptide post prandial serum test is essential for evaluating insulin production in diabetic patients, helping to tailor treatment plans and monitor disease progression."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Hemolyzed or lipemic sample
- Incorrect timing (not 2 hours post-meal)
- Insufficient sample volume
- Improper labeling or container
Understanding Your Results
High C-Peptide (above 7.0 ng/mL)
Suggests increased insulin production, possibly due to insulin resistance, type 2 diabetes, or insulinoma. Consult an endocrinologist for further evaluation.
Normal C-Peptide (1.0-7.0 ng/mL)
Indicates normal insulin production. Continue regular monitoring as per doctor's advice.
Low C-Peptide (below 1.0 ng/mL)
May indicate reduced insulin production, common in type 1 diabetes or advanced type 2 diabetes. Seek medical consultation for treatment adjustments.
If you experience symptoms like increased thirst, frequent urination, fatigue, or if your test results are abnormal, consult an endocrinologist promptly for diagnosis and management.
Limitations
- ⚠Not suitable for patients on exogenous insulin therapy
- ⚠Results may be affected by kidney or liver function
- ⚠Does not directly measure blood glucose levels
- ⚠Limited utility in type 1 diabetes with minimal insulin production
Risks & Considerations
- ●Minor bruising or swelling at the puncture site
- ●Rare risk of infection or bleeding
- ●Lightheadedness or dizziness during blood draw
Interfering Factors
- ●Insulin therapy or exogenous insulin administration
- ●Renal impairment or kidney disease
- ●Liver disease or hepatic dysfunction
- ●Certain medications like steroids or diuretics
- ●Sample handling errors or delayed processing
Compare With Similar Tests
| Test | C-Peptide Post Prandial Serum Test | Fasting Blood Glucose Test | Oral Glucose Tolerance Test | HbA1c Test | Insulin Level Test | C-Peptide Fasting Test |
|---|---|---|---|---|---|---|
| Comparison | C-Peptide Post Prandial Serum Test | Measures blood sugar after fasting; does not assess insulin production. | Evaluates blood sugar response to glucose load; less specific for insulin production. | Measures average blood sugar over 2-3 months; does not provide real-time insulin data. | Directly measures insulin; C-peptide is more stable and unaffected by exogenous insulin. | Measures C-peptide after fasting; postprandial test assesses meal-stimulated insulin response. |
Frequently Asked Questions
What is the C-peptide post prandial serum test?
Why is this test important for diabetes?
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What is the cost of the test?
What do high C-peptide levels indicate?
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Is home sample collection available?
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Can this test be done during pregnancy?
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