hsCRP
Other names: HS CRP, hs-CRP, CRP, High Sensitivity, (HS) C-Reactive Protein, High-Sensitivity CRP, HIGH SENSITIVE CRP, CRP HS, CRP - High sensitivity, ULTRA SENSITIVE CRP, HIGH SENSITIVITY CRP (Serum)
Optimal Result:
0 - 1 mg/L.
High-sensitivity C-reactive protein (hs-CRP) is an acute-phase protein released by the liver in response to inflammation. The high-sensitivity test detects lower concentrations than standard CRP testing, making it valuable for identifying chronic, low-grade inflammation that can contribute to long-term disease development. Numerous clinical studies have shown that elevated hs-CRP is associated with a higher risk of cardiovascular disease, heart attack, and stroke—even when cholesterol levels are normal. Because hs-CRP reflects systemic inflammation rather than a specific organ or condition, results should be interpreted in clinical context and, when abnormal, may warrant repeat testing or additional evaluation. Persistent elevations may be linked to metabolic syndrome, obesity, autoimmune disease, chronic infection, insulin resistance, or lifestyle-related inflammation. When combined with a lipid panel and other cardiac risk markers, hs-CRP strengthens cardiovascular risk prediction and guides prevention and treatment decisions.
Lab Results Explained and Tracked
What does it mean if your hsCRP result is too high?
An elevated high-sensitivity C-reactive protein (hs-CRP) result indicates that inflammation is occurring somewhere in the body. Because hs-CRP is highly sensitive, even small increases above the reference range may reflect low-grade, chronic inflammation—not just acute illness or infection. While hs-CRP does not reveal the exact cause or location of inflammation, persistently elevated levels are clinically meaningful and should be interpreted alongside symptoms, medical history, lifestyle factors, and additional laboratory markers.
When used to assess cardiovascular health, hs-CRP is an established predictor of heart disease risk. Levels between 1.0–2.9 mg/L are associated with intermediate cardiovascular risk, while values ≥ 3.0 mg/L suggest a higher long-term risk of heart attack, stroke, and atherosclerosis, even when cholesterol levels are normal. Extremely elevated values (> 10 mg/L) usually indicate acute inflammation—such as infection, injury, trauma, or recent surgery—and repeat testing after recovery is recommended before interpreting cardiovascular risk.
Inflammation reflected by elevated hs-CRP may arise from many possible sources, including recent viral or bacterial infection, autoimmune disease (such as rheumatoid arthritis or lupus), obesity, metabolic syndrome, insulin resistance, smoking, periodontal disease, chronic stress, environmental exposures, inflammatory bowel disease, or other systemic inflammatory conditions. Lifestyle factors—such as poor sleep, physical inactivity, excessive alcohol use, and diets high in processed foods—are also associated with higher hs-CRP levels. In some individuals, oral contraceptives, hormone therapy, and pregnancy (especially in later trimesters) may temporarily increase results.
Research shows that chronic inflammation is linked to the development of cardiovascular disease, type 2 diabetes, Alzheimer’s disease, chronic kidney disease, certain cancers, and autoimmune disorders. Therefore, a consistently elevated hs-CRP level—especially if unexplained—should be evaluated further. Your clinician may ask about recent illness or injury, assess cardiovascular and metabolic risk factors, review lifestyle contributors, or order additional tests such as a lipid panel, fasting glucose or insulin, ESR, ANA, CBC, thyroid markers, or imaging, depending on clinical suspicion.
Because hs-CRP can fluctuate, most experts recommend repeating the test in 2–3 weeks to confirm elevation, ideally when you are not sick, injured, or recovering from strenuous exercise. If levels remain high, targeted lifestyle and medical interventions may help reduce inflammation, including weight management, regular exercise, a nutrient-rich whole-foods diet, smoking cessation, adequate sleep, and stress reduction. In people with elevated cardiovascular risk, clinicians may consider cholesterol-lowering therapies such as statins, which are proven to reduce both LDL cholesterol and hs-CRP.
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