Insight into your CRP level.
CRP (C-reactive protein) is the most widely used marker for detecting inflammation in the body. A test gives insight into your current inflammatory status, with personal explanation from our doctors.
Also known as: C-reactive protein, inflammation marker, hs-CRP
Personal assessment by our BIG-registered doctors
How Bloodworks works
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Receive your lab form
Within 24 hours by email, with appointment planner
Schedule your blood draw
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Blood draw
Takes just a few minutes
Receive your report
Securely, typically within 2 working days from our physicians
Background
What is CRP?
CRP stands for C-reactive protein, a protein produced by the liver in response to inflammation anywhere in the body. It is one of the fastest-reacting inflammation markers, as early as 6 to 8 hours after the onset of inflammation the level is elevated, and it also falls quickly after recovery.
CRP is a general marker, an elevation shows that inflammation is present, not where. Elevated CRP can be caused by an acute infection, chronic inflammatory disease, tissue damage, or following surgery. For detecting low-grade chronic inflammation, for example in the context of cardiovascular risk, a more sensitive variant is sometimes used: hs-CRP.
In brief
Acute-phase protein
Produced by the liver during inflammation
Rapid response
Elevated within 6–8 hours
Rapid recovery
Falls quickly after inflammation resolves
Non-specific
Shows that, not where
This marker is also included in
Testing several values in a single draw takes one blood collection and gives a more complete picture. The choice is yours.
Common reasons to test
When can insight into your CRP be valuable?
Below are some situations in which measuring CRP can provide insight.
Insight into your status
A test gives a snapshot of inflammatory activity in the body.
With questions about general health
CRP is often measured as a basic check as part of a broader health picture.
For follow-up of a previous measurement
Those who previously had an elevated CRP can use a repeat measurement to check whether it has normalised.
With chronic inflammatory conditions
For those with a known chronic inflammatory condition, CRP can be used to monitor status, in consultation with a healthcare provider.
With questions about fatigue
Persistent fatigue is sometimes associated with low-grade inflammation, CRP can provide insight.
With gastrointestinal complaints
With persistent abdominal pain or changes in bowel habits, CRP can be included as a basic screening measure.
What your result means
CRP too high: what does your result mean?
CRP is measured in milligrams per litre (mg/L). Our doctor interprets your value against the reference ranges of the laboratory and your personal context.
A low value
A low CRP value indicates the absence of significant active inflammation at the time of testing. This is a reassuring picture. Bear in mind that very recently started inflammation (within 6 hours) or very localised inflammation may not yet be reflected.
A mildly elevated value
A mildly elevated CRP is common and can have many causes, a recent cold, a minor inflammation, or physical exertion shortly before the measurement. If in doubt, a repeat measurement after a few weeks may be worthwhile.
A significantly elevated value
A markedly elevated CRP may indicate an active inflammatory response or infection elsewhere in the body. For significantly elevated values, we advise you to contact your GP the same day for further investigation. Our doctor will also proactively make contact in that case.
How we interpret your result
Our doctors interpret your CRP value in the context of your symptoms, recent events (such as infections or exertion), and any known conditions. For significantly abnormal values, we proactively make contact with you.
Related tests
Often combined with CRP.
A single marker gives one perspective. For a broader picture you can combine CRP with a theme package or related markers.
+ €29 blood draw fee per orderFree from €225
Frequently asked questions
Everything you want to know
Do I need to fast for a CRP test?
No, you do not need to fast for a CRP measurement.
What is the difference between CRP and hs-CRP?
CRP is used for detecting significant inflammation or infection. hs-CRP (high-sensitivity CRP) is a more sensitive variant that can detect small elevations, relevant for assessing cardiovascular risk from low-grade chronic inflammation. We measure standard CRP.
Does exercise affect my CRP level?
Yes, intensive physical exercise can temporarily raise CRP. It is advisable to avoid extreme exertion for 24–48 hours before the measurement if you want a reliable baseline value.
How does CRP compare to ESR?
ESR (erythrocyte sedimentation rate) is the older inflammation marker. CRP reacts more quickly (hours versus days) and is less sensitive to other factors such as age, sex, or medication. In modern practice, CRP is often preferred; ESR remains valuable for specific conditions.
Does medication affect my CRP level?
Anti-inflammatory medication (such as NSAIDs or corticosteroids) can suppress CRP. Please let us know of any medication you are taking so we can take this into account.
How quickly does CRP fall after recovery from an infection?
CRP generally falls quickly, the half-life is approximately 19 hours. Within a few days of an inflammation resolving, the value is usually back to normal.
Can CRP be used for cancer screening?
No, CRP is not intended for cancer screening. The marker is not sufficiently specific or sensitive for that purpose. Other investigations are needed for cancer screening.
What do I do with my result?
You will receive a PDF report with your value and explanation. What you do with it, such as discussing it with your GP, remains entirely your choice.
In the Health Guide
Read more about this value
Ready for insight into your CRP level?
You receive your CRP level including personal explanation from a doctor, typically within 2 working days. No referral required.
Order CRP →Want to test multiple markers at once?
Combine CRP with other markers via Bloodworks Select. The blood draw and collection fee is charged once per order, and is waived from €225.
30,-
+ €29 blood draw fee+ €29 blood draw fee per order