Albumin
Albumin is the most abundant protein in blood, produced by the liver. It maintains oncotic pressure (keeps fluid in blood vessels) and transports hormones, vitamins, and drugs. Low albumin can indicate liver disease, malnutrition, kidney disease, or chronic inflammation.
Albumin is a negative acute phase reactant — it drops during infection and inflammation, making it an imperfect liver marker in isolation.
What It Measures
Concentration of albumin protein in blood serum.
Reference Ranges
| Status | Range (g/dL) |
|---|---|
| Optimal | 4.0–5.0 g/dL |
| Normal | 3.5–5.5 g/dL |
| Borderline | 3.0–3.5 g/dL |
| Out of Range | < 3.0 g/dL |
How GATOR Tracks This
Lab Providers
Related Clinical Ratios
Related Biomarkers
This content is for informational purposes only and does not constitute medical advice. Reference ranges may vary by laboratory and individual factors. Consult a qualified healthcare provider for interpretation of your results and treatment decisions.
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