Albumin — What It Means in Your Blood Test
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Albumin is the main protein your liver makes to keep fluid in balance and carry things around your body.
Albumin is one of the busiest proteins riding through your bloodstream. Measuring it gives a useful sense of both how your body is nourished and how steadily this protein is being supplied.
Also known as: Serum Albumin, Alb, S. Albumin
This isn't a case where higher or lower is better. Your body keeps it in a narrow band, and both directions can matter.
Last reviewed: 2026-08-16
What does Albumin do in your body?
You care about this because it helps keep water where it belongs. A low reading can go with puffiness in the ankles or face. As the liver's flagship product, it also mirrors both steady output and good protein feeding. A long-lasting drop is worth talking through with your care team [AASLD, 2023].
Albumin works like a sponge in your blood vessels, holding water inside instead of letting it seep into the tissues.
What is Albumin?
Made by the liver, this is the most abundant blood protein. It holds water inside blood vessels through osmotic pressure and ferries hormones, minerals, and medicines through the circulation.
Why is Albumin tested?
You have this test to look for a drop in how much of this protein the liver produces, or for poor protein nutrition.
What is a normal Albumin range?
- India
- No India-specific national reference interval is published for this parameter; your lab's printed range is the most reliable comparison.
- Global
- 3.5–5.0 g/dL
Ranges vary by lab, method and equipment — the range printed on your own report is the one that applies to your result.
Source: [AASLD, 2023]
What does your Albumin value mean?
There is no widely-accepted set of value bands for this parameter. Compare your result with the reference range printed on your own report, and discuss it with your doctor.
What does a high Albumin result mean?
A high level is most often just too little body fluid rather than a health problem.
What does a low Albumin result mean?
A low level can mean your liver makes less albumin, you get too little protein in food, or your body loses protein. It is worth discussing with your doctor.
What happens when your Albumin is low?
When albumin is low, less protein holds fluid inside your blood vessels, so fluid can leak into tissues and cause swelling [AASLD, 2023].
What can affect your Albumin result?
- Protein in your diet
- How well your liver builds proteins
- Hydration
- Inflammation in the body
- Age
Questions to ask your doctor
About this result
- What does my Albumin result mean for me specifically, given my age and health?
- Is my Albumin in the range that is right for me, not just the lab's general range?
What to do next
- Could anything I eat, do, or take have affected my main blood protein result?
- Is there anything I should do about my Albumin, or is it fine to leave as it is?
About retesting
- Does my Albumin need to be repeated, and if so, when?
- The typical range for Albumin can vary between labs — should I compare my result against my own lab's printed range?
The bigger picture
- Should my Albumin be looked at together with my Total Bilirubin and Direct Bilirubin result?
- Does my Albumin connect to any condition I already have, or to anything I have noticed in how I feel?
Frequently asked questions
- What is Albumin?
- Made by the liver, this is the most abundant blood protein. It holds water inside blood vessels through osmotic pressure and ferries hormones, minerals, and medicines through the circulation. You have this test to look for a drop in how much of this protein the liver produces, or for poor protein nutrition.
- What is a normal main blood protein test range?
- A typical adult range is around 3.5–5.0 g/dL. No India-specific national reference interval is published for this parameter; your lab's printed range is the most reliable comparison. Ranges vary by lab, method and equipment — the range printed on your own report is the one that applies to your result.
- What does a high Albumin result mean?
- A high level is most often just too little body fluid rather than a health problem.
- What does a low Albumin result mean?
- A low level can mean your liver makes less albumin, you get too little protein in food, or your body loses protein. It is worth discussing with your doctor.
- What can affect your Albumin result?
- Several everyday factors can influence it, including Protein in your diet, How well your liver builds proteins, Hydration, Inflammation in the body, Age.
Sources
- AASLD (2023) — Practice Guidance on Evaluation of Hepatic Function Tests
- CLSI (2010) — EP28-A3c Reference Interval Guidelines
Part of the Liver Function
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