CRP (C-reactive protein) is a non-specific inflammatory marker produced by the liver. Elevated CRP can indicate acute or chronic inflammation, infection, tissue damage, autoimmune conditions, or even stress. Common causes include bacterial infections (e.g., respiratory or urinary tract), rheumatic diseases, injuries, or post-surgery states. Chronic conditions like obesity, diabetes, or cardiovascular risk are also associated with mildly elevated CRP. Importantly, CRP is not diagnostic on its own – a high level requires further investigation. Very high levels (>100 mg/L) typically point to acute infection, while persistently mild elevations (2–10 mg/L) may suggest chronic inflammation. Blood measurement is standardized, but consumer home tests may have variability. Always consult a doctor for interpretation. Evidence is strong (human-strong) as CRP is clinically validated for decades.
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