Albumin is the main protein made by the liver. It keeps fluid inside blood vessels and carries hormones, medicines and nutrients.
- Normal range (adults)
- 3.5–5 g/dL (35–50 g/L)
- Sample
- Blood
- Fasting
- Not usually needed
- Also called
- Serum Albumin, ALB, S.Albumin, Blood Albumin
Albumin normal range
| Group | g/dLConventional units: US, South Asia | g/LSI units: UK, Europe, Australia, international |
|---|---|---|
| Adults | 3.5–5 | 35–50 |
Your report may use either unit system; labs in the Gulf often print both. Ranges also vary slightly between laboratories, so the range printed on your own report is the one to go by.
Why is the Albumin test done?
It reflects liver function, nutrition and protein loss through the kidneys.
What does a high Albumin level mean?
A high albumin is almost always due to dehydration.
Common causes
- Dehydration
- Tight tourniquet during blood collection
Diet and lifestyle tips
- Drink enough water and repeat the test
What does a low Albumin level mean?
A low albumin can cause swelling of the legs or abdomen and suggests liver or kidney disease, malnutrition or inflammation.
Common causes
- Liver disease, including cirrhosis
- Kidney disease with protein in the urine
- Malnutrition
- Severe infection or inflammation
- Gut disorders
Diet and lifestyle tips
- Include good-quality protein: eggs, fish, chicken, dairy, lentils
- Eat regular meals with enough calories
- Follow salt and fluid advice from your doctor if you have swelling
When should you see a doctor?
A low albumin should always be explained by a doctor, especially with swelling or foamy urine.
Last updated
This page is for general education and is not a diagnosis. Normal ranges differ between laboratories, so always compare your result with the reference range printed on your own report, and discuss abnormal results with your doctor.