Liver
Albumin
LOINC 1751-7 · g/dL
Ranges
Reference range: 3.5–5 g/dL
What it is
Albumin is the most abundant protein in your blood, made by the liver. It keeps fluid inside vessels and carries hormones and nutrients.
Why it matters
It reflects liver function, nutrition and hydration, and is a useful general health marker.
What high values can mean
A higher value usually reflects dehydration rather than a disease.
What low values can mean
A lower value can relate to liver disease, malnutrition, inflammation or kidney loss of protein.
How to improve it
Treating the underlying cause and adequate protein nutrition support healthy albumin.
Food & lifestyle
A balanced diet with enough protein helps; the cause of a low albumin matters more than diet alone.
Preparing for the test
Often part of a metabolic or liver panel; fasting is not specifically required — follow your lab.
When to talk to a doctor
Discuss a persistently low albumin with a doctor, interpreted with liver and kidney tests.
Related markers
Sources
- MedlinePlus (NIH)
- Testing.com (AACC)
Content reviewed on June 26, 2026
Medical disclaimer
This content is for educational purposes only. It is not medical advice and does not diagnose, treat, or prevent any condition. Reference ranges vary between laboratories — always use the range printed on your report and discuss your results with a healthcare professional.
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