Understanding C-Reactive Protein (CRP): Normal vs Optimal Ranges

Also known as: crp, high-sensitivity crp, hs-crp, c reactive protein

InflammationUnit: mg/L

?What is C-Reactive Protein (CRP)?

C-Reactive Protein (CRP) is an acute phase reactant produced by the liver in response to inflammation in the body. Elevated CRP levels can indicate systemic inflammation, infection, or tissue damage. High-sensitivity CRP (hs-CRP) testing is particularly useful for assessing cardiovascular disease risk.

!Why It Matters

CRP concentration may suggest the presence of inflammation or infection in the body, which can be associated with various acute and chronic conditions. Elevated levels, particularly when measured by high-sensitivity assays, could indicate increased cardiovascular risk. Monitoring CRP can help guide treatment decisions and track inflammatory status over time.

Reference Ranges

Range TypeMinMaxUnitNote
Lab Normal03mg/LStandard lab reference range
Optimal01mg/LEvidence-based optimal range for health
Longevity Target01mg/LPer longevity medicine research (Attia et al.)

Lab normal ranges may vary between laboratories. Optimal and longevity targets are based on research literature and should be interpreted with your physician.

Symptoms of Imbalance

  • Persistent fatigue
  • Joint or muscle pain
  • Recurring fever
  • Unexplained malaise
  • Swelling or redness at injury sites

How to Improve Your Levels

  • 1Reduce intake of processed foods and added sugars
  • 2Increase consumption of anti-inflammatory foods (fatty fish, leafy greens, berries)
  • 3Engage in regular moderate-intensity exercise
  • 4Manage stress through meditation or mindfulness practices
  • 5Ensure adequate sleep (7–9 hours nightly)
  • 6Address underlying infections or chronic conditions with medical guidance

When to Test

CRP testing is recommended when assessing cardiovascular risk, investigating signs of infection or inflammation, monitoring chronic inflammatory conditions, or evaluating recovery from acute illness. Regular screening may be considered for individuals with multiple cardiovascular risk factors.

Related Biomarkers

Track your C-Reactive Protein (CRP) with ByoMap

Upload your blood report and get personalized C-Reactive Protein (CRP) ranges based on your age, sex, and ancestry — free.

Try Free — Upload Your Report