hs-CRP (high-sensitivity C-reactive protein) is a blood test that measures low levels of inflammation. For heart risk, a level below 1 mg/L is considered lower risk, 1 to 3 mg/L average risk, and above 3 mg/L higher risk. A high hs-CRP does not diagnose heart disease, but it can tip the balance toward more aggressive prevention, especially when combined with cholesterol, blood pressure and other risk factors.
Medically reviewed by
Board-certified cardiologist · Katy & Sugar Land, TX
Fellowship-trained in cardiovascular disease, interventional cardiology, echocardiography and advanced heart failure and transplant cardiology. Former Assistant Professor of Cardiology at McGovern Medical School.
What is hs-CRP?
C-reactive protein is made by the liver in response to inflammation. The standard CRP test detects large rises from infection or injury. The high-sensitivity version (hs-CRP) detects much smaller elevations linked to chronic, low-grade inflammation inside blood vessels, which plays a role in atherosclerosis. MedlinePlus explains that hs-CRP may be used to help assess heart disease risk.
| hs-CRP level (mg/L) | Cardiovascular risk category |
|---|---|
| Less than 1.0 | Lower |
| 1.0 to 3.0 | Average |
| Greater than 3.0 | Higher |
| Greater than 10 | Usually reflects acute infection or inflammation; repeat after recovery |
Why hs-CRP may be high
- Recent infection, injury, dental problems or a flare of arthritis.
- Excess weight, especially abdominal fat.
- Smoking.
- Diabetes and insulin resistance.
- Inactivity and poor sleep, including sleep apnea.
- Autoimmune and inflammatory conditions.
- Some medicines, including estrogen therapy.
Because short-term illness can raise it, a single high value is usually repeated, ideally two weeks or more after any infection.
What a high hs-CRP means for your heart
A high hs-CRP indicates more inflammation, which is associated with a higher risk of heart attack and stroke, even when LDL cholesterol looks acceptable. It is one piece of a larger puzzle. Cardiologists combine it with cholesterol, lipoprotein(a), blood pressure, blood sugar, smoking status, family history and sometimes a coronary calcium scan to estimate your overall risk. Learn about heart disease risk assessment and atherosclerosis.
How to lower hs-CRP and heart risk
- Move more: regular aerobic exercise reduces inflammation.
- Lose excess weight: even modest loss lowers hs-CRP.
- Stop smoking.
- Eat an anti-inflammatory pattern: vegetables, fruit, whole grains, legumes, nuts, olive oil and fish; limit processed meats, refined carbohydrates and sugary drinks. See our heart-healthy diet guide.
- Sleep 7 to 9 hours and treat sleep apnea.
- Control blood sugar and blood pressure.
- Medicines: statins lower both LDL and hs-CRP. Your cardiologist may discuss other options based on your risk profile.
Living with high hs-CRP
A high hs-CRP is a call to action, not a reason for alarm. Work with your doctor to address each modifiable risk factor and recheck periodically. If you have symptoms such as chest discomfort or breathlessness with activity, see signs of blocked arteries and seek evaluation.
Preventive cardiology in Katy and Sugar Land
Dr. Adnan Khalid has a special interest in atherosclerosis and preventive cardiology. At our Katy and Sugar Land offices, we interpret hs-CRP alongside your full risk profile and build a plan to lower it. Learn about preventive cardiology and high cholesterol treatment.
Katy office: 410 W Grand Pkwy S, Suite 4D, Katy, TX 77494
Sugar Land office: 7102 Tarrington Ave, Suite 505, Sugar Land, TX 77479
Phone: (713) 258-6111
We also see patients from Fulshear, Richmond, Rosenberg, Stafford, Missouri City and west Houston.
High hs-CRP on your lab report?
Find out what it means for your heart. Request a preventive cardiology visit in Katy or Sugar Land.
Having symptoms right now? Call 911. Do not wait for an appointment.
Frequently asked questions
What is a normal hs-CRP level?
For heart risk, below 1 mg/L is lower risk, 1 to 3 mg/L average, and above 3 mg/L higher. Values above 10 usually reflect acute inflammation.
What does high hs-CRP mean?
It indicates low-grade inflammation linked to higher heart attack and stroke risk. It does not diagnose heart disease on its own.
Can hs-CRP be high without heart disease?
Yes. Infections, injuries, arthritis, obesity, smoking and other conditions can raise it.
How can I lower my hs-CRP naturally?
Exercise, weight loss, stopping smoking, an anti-inflammatory diet, good sleep and controlling blood sugar all help.
Do statins lower hs-CRP?
Yes. Statins lower hs-CRP as well as LDL cholesterol.
Should I repeat a high hs-CRP test?
Usually yes, at least two weeks after any infection or illness, to confirm the level.
Trusted health resources
- C-Reactive Protein (CRP) Test, MedlinePlus, U.S. National Library of Medicine
- C-reactive protein, MedlinePlus Medical Encyclopedia
- Atherosclerosis, National Heart, Lung, and Blood Institute (NIH)
Medical disclaimer: This article is for general education and is not a diagnosis or a substitute for care from your own doctor. If you think you may be having a heart attack, stroke or another emergency, call 911 right away.
