Albumin blood test
In short
A typical adult albumin result is 3.5 to 5 g/dL. A high albumin usually means the blood is a bit concentrated, most often from not drinking enough. On its own it is rarely a sign of disease. Always read your result against the range printed on your own report.
The main protein in blood, made by the liver.
Albumin keeps fluid inside blood vessels and carries hormones, vitamins and medicines around the body. The liver makes it, so doctors use it as a sign of how well the liver is working. Illness, inflammation and poor nutrition can lower it too, so it also reflects general health.
Is my Albumin high or low?
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Typical range
| For | Range | Unit |
|---|---|---|
| Adults | 3.5–5 | g/dL |
| Adults | 35–50 | g/L |
Typical ranges for adults. Labs differ a little, so the range printed next to your result is the one to go by.
If your Albumin is high
A high albumin usually means the blood is a bit concentrated, most often from not drinking enough. On its own it is rarely a sign of disease.
Common reasons
- Not drinking enough fluid, or losing fluid through vomiting or diarrhea
- The arm band (tourniquet) left on too long during the blood draw
- Some medicines, including steroid medicines
If your Albumin is low
A slightly low albumin is common during or after an illness. A clearly low level usually has a cause worth finding.
Common reasons
- A recent illness, infection or inflammation, which slows albumin production
- Pregnancy, when extra fluid in the blood dilutes it
- Not eating enough protein, or not eating for a day or two
- Long bed rest, or lying down during the blood draw
- Less often: protein leaking into urine from kidney disease
- Less often: liver disease or a gut condition that blocks protein absorption
What can throw it off
Not drinking enough raises albumin, while pregnancy and lying down during the draw lower it.
Questions to take to your appointment
- 1Could a recent illness or not drinking enough explain this?
- 2Should my urine be checked for protein?
- 3Do my liver tests and other proteins point the same way?
Read together with
Doctors rarely read Albumin alone. These usually sit next to it.
- Total proteinAll the protein in the liquid part of blood.
- GlobulinBlood proteins that include antibodies, the infection fighters.
- CreatinineA waste product from muscles that the kidneys clear.
- ALTAn enzyme that lives mostly inside liver cells.
- CalciumA mineral that builds bones and keeps nerves and muscles working.
Quick answers
What is the albumin blood test?
Albumin: The main protein in blood, made by the liver. Albumin keeps fluid inside blood vessels and carries hormones, vitamins and medicines around the body. The liver makes it, so doctors use it as a sign of how well the liver is working. Illness, inflammation and poor nutrition can lower it too, so it also reflects general health.
What is a normal albumin level?
For most adults, albumin is typically 3.5 to 5 g/dL. Some countries print it in g/L, so check the unit first. Labs differ a little, so the range printed next to your result is the one to go by.
What does a high albumin mean?
A high albumin usually means the blood is a bit concentrated, most often from not drinking enough. On its own it is rarely a sign of disease. Common reasons include not drinking enough fluid, or losing fluid through vomiting or diarrhea; the arm band (tourniquet) left on too long during the blood draw; and some medicines, including steroid medicines. A doctor reads it together with your other results and how you feel.
What does a low albumin mean?
A slightly low albumin is common during or after an illness. A clearly low level usually has a cause worth finding. Common reasons include a recent illness, infection or inflammation, which slows albumin production; pregnancy, when extra fluid in the blood dilutes it; not eating enough protein, or not eating for a day or two; and long bed rest, or lying down during the blood draw.
What can affect my albumin result?
Not drinking enough raises albumin, while pregnancy and lying down during the draw lower it.
What should I ask my doctor about my albumin?
Questions worth taking to the appointment: Could a recent illness or not drinking enough explain this? Should my urine be checked for protein? Do my liver tests and other proteins point the same way?
What this page can’t do
It reads each number on its own.
Doctors read results together — ALT with AST, ferritin with hemoglobin, TSH with free T4. A pattern says more than any single flag.
It doesn't know you.
Your age, your medicines, how you feel and your last result all change what a number means.
It doesn't remember.
Close this page and your results are gone. That's on purpose: nothing was ever sent to us.
We also make Vita: Health Coach, an app for those parts. It reads your whole report with your medicines and history in mind, answers follow-up questions in plain words, and keeps your reports in one place — for you and for the people you look after.
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