wie hoch darf der crp wert sein — when to see a doctor?

C-reactive protein (CRP) is a non-specific marker of inflammation. Normal levels are typically below 5 mg/L, with many labs using <3 mg/L as the reference. Mild elevations (5–10 mg/L) can result from lifestyle factors like smoking, obesity, or minor infections. Levels above 10 mg/L suggest significant inflammation—possibly due to infection, autoimmune disease, or tissue injury. Values >50 mg/L often indicate a serious bacterial infection. You should see a doctor if your CRP exceeds 10 mg/L or if you have symptoms such as fever, pain, shortness of breath, or unexplained fatigue. Even persistently mildly elevated CRP (2–10 mg/L) warrants medical evaluation, as it is associated with increased cardiovascular risk. Importantly, CRP alone is not diagnostic—it must be interpreted in the full clinical context. The evidence is based on decades of clinical practice and guidelines, not on single genetic tests. Direct-to-consumer CRP tests exist but are of limited value without physician interpretation.