Serum Albumin Globulin Ratio Test

The serum albumin-globulin (A/G) ratio is not a single lab test but a calculated value derived from total protein, albumin, and globulin results in your blood. Most Bangladeshi readers will encounter it inside a liver function test (LFT) or a comprehensive health checkup package. The core message is clear: the A/G ratio is a supportive screening marker, not a standalone diagnostic tool. Doctors use it to check liver and kidney health and to investigate chronic inflammation. Abnormal values are always interpreted alongside other blood results, symptoms, and imaging.

What is the serum albumin-globulin (A/G) ratio test?

The serum albumin-globulin (A/G) ratio is a calculated value that compares the amount of albumin to globulin in your blood. Albumin is a protein made by the liver that helps maintain fluid balance and transport substances like hormones and drugs. Globulins are a group of proteins involved in immune function, blood clotting, and other roles. The ratio is calculated as: A/G ratio = Albumin / (Total Protein − Albumin) or directly from measured globulin. A normal ratio typically falls between 1.0 and 2.0, though reference ranges can vary slightly by laboratory. The A/G ratio is a supportive marker, not a standalone diagnostic tool.

Why would a doctor order this test?

Doctors commonly order the A/G ratio as part of a routine health checkup or when investigating symptoms such as jaundice, swelling in the legs or abdomen, unexplained fatigue, weight loss, or dark urine. It is also used to monitor known conditions like chronic hepatitis, cirrhosis, nephrotic syndrome, or multiple myeloma. Because the ratio reflects both liver protein production and kidney protein loss, it provides a broad screening clue for several organ systems.

How to prepare and what happens during the blood draw

No special preparation is needed for the A/G ratio alone. However, if the test is part of a fasting panel (e.g., comprehensive metabolic panel), your doctor may ask you to fast for 8–12 hours. A healthcare professional will draw blood from a vein in your arm, which takes a few minutes. You may feel a slight pinch or bruising at the puncture site. Results are usually available within 24 hours.

How to read your result: normal, low, and high A/G ratios

Your lab report will show the A/G ratio along with albumin and total protein values. The typical reference range is 1.0–2.0, but always check the range printed on your report. The table below summarizes what different values may suggest.

Conditions linked to abnormal A/G ratios — and why the ratio alone can’t diagnose

A low A/G ratio (below 1.0) can be associated with:

• Liver disease (cirrhosis, hepatitis) – the liver produces less albumin.
• Nephrotic syndrome – albumin is lost in urine.
• Malnutrition or chronic inflammation – decreased albumin production or increased globulin.
• Multiple myeloma – abnormal globulin production.

A high ratio (above 2.0) is less common and may indicate low globulin due to immunodeficiency or certain leukemias, or elevated albumin due to dehydration.

It is crucial to understand that the A/G ratio alone cannot diagnose any of these conditions. Your doctor will interpret it alongside other lab tests (liver enzymes, kidney function, protein electrophoresis), imaging, and your symptoms. Confirmatory testing is always required.

What does the A/G ratio test cost in Bangladesh?

In Bangladesh, the A/G ratio is rarely billed as a standalone test; it is almost always included in a liver function test (LFT) or a comprehensive health checkup package. Prices vary by city, lab quality, and package. The table below gives approximate ranges.

Costs change frequently; always confirm the current price with the lab before booking.

When should you see a doctor about A/G ratio results?

If your A/G ratio is outside the normal range, share the report with your primary care physician. They may refer you to a hepatologist (liver specialist) or nephrologist (kidney specialist) depending on other findings. Seek prompt medical attention if you have symptoms such as yellowing of the skin or eyes, persistent swelling, unexplained weight loss, or extreme fatigue. Early evaluation can help identify the underlying cause.

Find nephrologist and urologist doctors by division in Bangladesh

If you need to consult a kidney or urinary tract specialist, you can find qualified doctors across Bangladesh using the directory below.

Frequently Asked Questions

Can a normal A/G ratio still mean I have liver or kidney disease?

Yes. A normal ratio does not rule out disease because both albumin and globulin can rise or fall together, keeping the ratio within range. For example, someone with early cirrhosis may have both lowered albumin and lowered globulin, resulting in a normal ratio despite significant liver damage. Doctors rely on the individual albumin and globulin values, not just the ratio.

Why might my A/G ratio be low even though I feel completely healthy?

Temporary factors can lower the ratio without disease. Dehydration, pregnancy, prolonged fasting, or even intense exercise before the test may alter protein levels. Certain medications like oral contraceptives or steroids can also affect globulin. It is best to confirm an abnormal ratio with a repeat test after normalizing your routine and discussing your medications with your doctor.

Sources

The following sources are from international journals, government health agencies, or recognized medical organizations:

• Albumin Blood Test – MedlinePlus (medlineplus.gov)
• Globulin Test – MedlinePlus (medlineplus.gov)
• Albumin – Mayo Clinic Laboratories (mayoclinic.org)
• World Health Organization — Serum Albumin Globulin Ratio Test (who.int)
• MedlinePlus — Serum Albumin Globulin Ratio Test (medlineplus.gov)
• CDC — Serum Albumin Globulin Ratio Test (cdc.gov)