CRP – what do your numbers mean?
Have you had your CRP level measured and are unsure what the numbers mean? Here's a clear explanation of the normal range, what a too high or too low level can mean, and when it makes sense to get tested.
What is the normal range for CRP?
What is the normal range for CRP?
CRP (C-reactive protein) is an acute-phase protein produced in the liver in response to inflammation, infection, or tissue damage. The normal reference range for CRP in the blood is generally below 5-10 mg/L, depending on the laboratory's measurement methods. In healthy individuals, the level is typically very low, often below 1 mg/L. The level can vary slightly depending on age, gender, and physiological conditions such as pregnancy, where the level may be slightly higher. Smokers and overweight individuals also tend to have higher CRP levels. Being close to the upper limit may indicate a mild inflammatory condition that should be monitored to rule out underlying diseases.
What does a low level mean?
A low level of CRP, often below 1 mg/L, is considered normal and indicates the absence of significant inflammation or infection. There are no specific symptoms associated with low CRP levels, as it is typically a sign of a healthy state. In some individuals, very low levels may be related to an anti-inflammatory lifestyle, including a healthy diet and regular exercise. No specific action is necessary with low CRP levels, but it is important to maintain a healthy lifestyle to minimize the risk of future inflammatory diseases.
What does a high level mean?
A high level of CRP, above 10 mg/L, can indicate acute inflammation, often caused by infections, tissue damage, or chronic inflammatory diseases such as rheumatoid arthritis. In bacterial infections, the level can reach 50-200 mg/L, while viral infections typically cause lower increases, often below 30 mg/L. Symptoms may include fever, pain, or swelling depending on the underlying cause. If the CRP level is elevated without an obvious cause, a doctor should be consulted for further investigation. Very high values, especially above 200 mg/L, may indicate serious conditions such as sepsis or extensive tissue damage, requiring acute medical treatment.
Get your CRP level tested
At Celto, you can order a blood test for CRP directly online – without a doctor's referral and without a long waiting time. We have over 34 sample collection sites at public hospitals throughout Denmark, and your samples are analyzed at the same accredited laboratories used by the rest of the healthcare system. You will receive your results directly on sundhed.dk, just like all other blood tests from the public system.
How it works
When you order a blood test from Celto, you choose which markers you want to be tested – no doctor's referral necessary. After your purchase, you will receive an email with a link to our booking system, where you choose time and location. The blood test itself is taken by authorized healthcare personnel and typically only takes a few minutes.
Where you can get tested
Celto has over 34 sample collection sites at public hospitals and clinics throughout Denmark. You choose the location that suits you best among our partners, and there are typically available times within a few days. Find your nearest sample collection site →
How to get your results
Your blood samples are analyzed at the same laboratories used by your own doctor and the rest of the healthcare system, with the exact same quality and the exact same tests. You will receive your results directly on sundhed.dk within a few working days, and Celto will also send an easy-to-understand overview of your values so you know what the numbers mean.