C-reactive protein (CRP) is a protein that is synthesized by the liver, it’s known to be one of the most sensitive markers of inflammation or infection. CRP levels tend to rise before you have symptoms of pain or a fever; while an elevation may also indicate an underlying inflammatory disease such as rheumatoid arthritis, lupus or vasculitis.

What is a c-reactive protein test?

A CRP test is commonly used to check for inflammation - this can usually indicate infection, an inflammatory disease such as rheumatoid arthritis or risk of heart disease.

What is a high CRP level?

According to Mayo Clinic, less than 10 mg/L is considered a ‘normal’ reading, while if the levels are greater than 10 mg/L, it may be a sign of serious infection [1]. It’s important to remember that these numbers aren’t absolute and your CRP levels tend to vary over time.

If you’re interested in knowing more about your CRP levels, it's recommended you consider taking a test if:

  • You are at risk for chronic inflammatory diseases including rheumatoid arthritis, lupus or vasculitis
  • You are at risk for Crohn's disease
  • You are at risk for bowel disorders
  • You are overweight
  • You require a risk assessment for cardiovascular diseases
  • You require a risk assessment for cancers

See also: 10 Simple Tips For a Healthy Heart

One of the most reliable ways to know more about your CRP levels is by taking a test. This can be done by taking a trip to your doctor or from home with an at-home lab test.

LetsGetChecked’s at-home CRP Test works by identifying inflammation in your body with online results available within 2-5 days. Our expert medical team is available 24/7 to answer any questions you may have throughout the process.


  1. Mayo Clinic. C-reactive protein test. Online: Mayoclinic.org, 2017