hs-CRP (High-Sensitivity C-Reactive Protein)
Here’s what it reflects — and what to do about it.
Longetic pulls together every lab and record you’ve had, follows how hs-CRP (High-Sensitivity C-Reactive Protein) changes over time, and explains what’s shifting — so you walk into your next appointment prepared, with reminders for retests along the way.
What is hs-CRP (High-Sensitivity C-Reactive Protein)?
Measures low levels of a liver protein that rises with inflammation, also studied as a marker of cardiovascular risk.
C-reactive protein is produced by the liver in response to inflammation anywhere in the body, and the high-sensitivity (hs-CRP) assay can detect lower concentrations than a standard CRP test. This makes hs-CRP useful both as a general marker of inflammation, similar to ESR, and as an additional data point in cardiovascular risk assessment alongside factors such as cholesterol levels, blood pressure, and lifestyle. Because CRP is non-specific, a raised level can reflect anything from a minor infection or recent injury to an ongoing autoimmune or inflammatory condition. Clinicians interpret hs-CRP together with symptoms, other inflammation markers, and, when relevant, cardiovascular risk factors rather than as a stand-alone measure.
Lifestyle factors that influence this marker
- Aim for a balanced, anti-inflammatory eating pattern rich in vegetables, fruit, whole grains, and healthy fats such as olive oil and fatty fish
- Stay physically active with regular moderate exercise
- Prioritize consistent, restorative sleep
- Practice stress-management techniques
- Avoid smoking
- Maintain a body weight that feels comfortable and sustainable for you
- Moderate alcohol intake
Tests often checked alongside this
- ESR — another general inflammation marker often checked alongside
- Complement C3 and C4 — may be reviewed together in suspected autoimmune conditions
- ANA Pattern and ANA Titer — commonly checked if autoimmune disease is suspected
How this can show up in how you look and feel
- May be associated with fatigue
- May be associated with joint pain
- May be associated with symptoms related to cardiovascular risk factors
- May be associated with recent minor illness or injury
What can affect this marker
- Age
- Sex
- Pregnancy
- Infection
- Inflammation
- Exercise, especially recent vigorous activity
- Smoking
- Medications
- Lab variability between testing methods
What to track over time
- Whether the result trends up or down over time
- How hs-CRP compares with ESR and lipid-related cardiovascular risk factors
- Whether repeat testing is considered during suspected flares or for ongoing cardiovascular risk assessment
What to ask your doctor
- Is this result being used to look at inflammation, cardiovascular risk, or both?
- Could recent illness, injury, or exercise be affecting this result?
- How does this relate to my ESR and other cardiovascular risk factors?
- Should this be rechecked in the future?
This glossary entry is for informational purposes only and is not a substitute for professional medical advice. Read our Terms of Use.
References
About our sources
Official sources
Government health agencies, national institutes, and intergovernmental bodies whose guidelines carry regulatory or policy weight.
Clinical / professional
Medical societies, specialty colleges, and professional associations whose consensus statements reflect clinical practice standards.
Peer-reviewed research
Original research articles and systematic reviews published in indexed journals and verified through PubMed or DOI.