C-Reactive Protein Blood Test Levels: What Do They Mean

  • A simple blood test can detect the level of C-Reactive protein (CRP) in the blood, which is a marker for inflammation in the body.

  • If you are worried about your CRP levels, one of the best tools for peace of mind is a stroke and cardiovascular risk screening.

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Medically reviewed by Dr. Andy Manganaro, MD, FACS, FACC

Published on 9/9/2021

What is a C-Reactive Protein Blood Test?

This simple blood test detects the level of C-Reactive protein (CRP) in the blood, which is a marker for inflammation in the body. CRP data provides a more complete analysis of a person’s overall risk for cardiovascular disease when combined with other screening tests.

Additionally, CRP tests are used to monitor people who have lupus, rheumatoid arthritis, and many other conditions that involve the body’s immune system1. C-Reactive protein is produced by the liver. It is sent into your bloodstream in a reaction to inflammation, which is your body's way of protecting your tissues if you have been injured or have an infection. It can cause pain, redness and swelling in the injured or affected area.

When Should You Have C-Reactive Protein Blood Levels Tested?

All adults aged 50 plus, and adults aged 40 plus who have any of the risk factors for cardiovascular disease should get a C-Reactive protein test annually. Risk factors include diabetes, high blood pressure, high cholesterol, obesity, smoking and family history of cardiovascular disease.

But it is important to know that a C-Reactive protein test is not a test for heart disease. It is a test for inflammation in the body and usually included along with other tests.

What is a Normal CRP Level?

CRP is measured in milligrams per liter. Results for a standard C-Reactive protein blood test are usually given as follows2:

  • CRP below 1 mg/L is classified as low risk, 1-3.09 mg/L is moderate risk, and CRP above 3.1 mg/L is generally considered to put a person at higher risk for developing cardiovascular disease.
  • CRP is an indicator for a wide range of disease processes and should not be interpreted without a complete clinical history. Always share your C-Reactive protein test results with your personal physician, who will work with you to bring your CRP levels down if needed.

How to Get Your C-Reactive Protein Level Back to Normal

For starters, lifestyle has a direct impact on CRP levels. Certain dietary habits, such as a high intake of trans-fatty acids, can increase CRP levels. Exercise alone has been indicated to be a means of lowering CRP levels. By lowering your C-Reactive Protein level, you may be able to protect yourself against chronic inflammation before it progresses to a life-threatening disease.Schedule your C-Reactive Protein Blood Test with Life Line Screening today.

Our $149 Screening Package will assess your risk for Stroke and Cardiovascular disease.

Screening package includes

Carotid Artery Disease
Peripheral Artery Disease
Abdominal Aortic Aneurysm (AAA)
Atrial Fibrillation

Learn more or schedule a screening today at lifelinescreening.com — or give us a call at 800.718.0961. We'd love to help.


1C-Reactive Protein Test to screen for heart disease, Harvard Health Publishing, Harvard Medical School, March 21, 2017, https://www.health.harvard.edu/heart-health/c-reactive-protein-test-to-screen-for-heart-disease

2C-Reactive Protein Test, Life Line Screening https://www.lifelinescreening.com/screening-services/c-reactive-protein-screening


Cardiovascular Wellness

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