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Comprehensive Metabolic Panel (CMP)

Published: July 31, 2026Updated: July 31, 2026

A blood test that measures glucose, calcium, electrolytes, and evaluates kidney and liver function.

Quick summary

{"Measures 14 different substances in the blood","Evaluates kidney and liver function","Checks blood sugar and electrolyte levels","Requires 8-12 hours of fasting before the test","Commonly used for routine health checkups and monitoring chronic conditions"}

Medically reviewed by WellAlly Editorial TeamLast reviewed July 31, 2026Editorial policy

Key facts at a glance

Category
chemistry
Sample
serum
Fasting
false

What is this test?

The Comprehensive Metabolic Panel (CMP) is a blood test that provides important information about your body's chemical balance and metabolism. It measures 14 different substances including glucose (blood sugar), calcium, proteins, and electrolytes (sodium, potassium, chloride, and bicarbonate). The test evaluates how well your kidneys and liver are working, and it helps detect conditions such as diabetes, kidney disease, and liver disorders.

Frequently asked questions

Do I need to fast before a CMP test?
Yes, you should fast for 8-12 hours before the test. Only water is typically allowed during the fasting period. Fasting ensures accurate results, especially for glucose and lipid measurements.
What do abnormal CMP results indicate?
Abnormal results may indicate various conditions depending on which values are outside the normal range. High blood sugar may suggest diabetes; abnormal kidney function tests may indicate kidney disease; elevated liver enzymes may point to liver damage or disease. Your healthcare provider will interpret the results in the context of your overall health.
How is the CMP test performed?
A healthcare professional will draw a blood sample from a vein in your arm using a small needle. The sample is then sent to a laboratory for analysis. The procedure typically takes only a few minutes.
Are there any risks associated with this test?
The risks are minimal and include slight pain or bruising at the injection site, lightheadedness, and in rare cases, infection. These side effects usually resolve quickly.
  1. 1
    MedlinePlus - Comprehensive Metabolic PanelSource
  2. 2
    Mayo Clinic - Blood Glucose TestSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed July 31, 2026. · Read our editorial policy