Myths vs facts: hsCRP and Darmgesundheit

hsCRP (high-sensitivity C-reactive protein) is a well-established biomarker for systemic inflammation, but it is not a specific test for gut health. A common myth is that elevated hsCRP automatically indicates 'leaky gut' or intestinal permeability. In reality, hsCRP can rise in many inflammatory conditions—from infections and autoimmune diseases to obesity and metabolic syndrome. While gut health can influence systemic inflammation (e.g., in inflammatory bowel disease), hsCRP alone lacks sensitivity and specificity for diagnosing gut barrier dysfunction. Studies show a modest association between increased intestinal permeability and elevated hsCRP, but no validated cutoff exists for gut-specific interpretation. The fact is: hsCRP is a useful screening tool for overall inflammation, but it cannot replace dedicated gut health assessments like stool markers (calprotectin, zonulin) or endoscopic evaluation. Evidence for hsCRP as an inflammatory marker is strong (human-strong), but its role in gut health diagnostics is indirect and moderate (human-moderate). Consumers should be cautious of direct-to-consumer claims linking hsCRP directly to 'leaky gut' without clinical context.