Liver · Blood test
Globulin blood test: normal range explained
Also printed as: Serum Globulin, Glob, Globulins
Globulin is the blood proteins other than albumin, including the antibodies that fight infection, and labs usually calculate it as total protein minus albumin. The adult range commonly printed on Indian reports is 2.0–3.5 g/dL, but the range printed on your own report is the one that applies, and it is read with albumin and the A/G ratio.
Last updated 5 sources
What is the normal range for globulin?
| Printed for | Range |
|---|---|
| Adults | 2.0–3.5g/dL |
Reference ranges vary between laboratories. Always use the range printed on your own report. Why ranges differ between labs
Sources:Testing.com, Lab Tests Online UK
What does globulin measure?
Globulins are the proteins in your blood apart from albumin. They include antibodies, which help fight infection, and proteins that move nutrients and other substances around the body. Some are made by the liver and others by the immune system.
Labs split globulins into four groups, alpha-1, alpha-2, beta and gamma, which a separate test called protein electrophoresis measures one by one. On a routine report, globulin is a single calculated number, total protein minus albumin, and makes up about 40% of total protein.
Why do doctors order the globulin test?
Doctors see globulin as part of the total protein and A/G ratio test on a liver function profile or metabolic panel. A change in globulin can point to the immune system being activated or depleted, so the test helps in checking liver disease, kidney disease, infections, inflammation and some blood disorders.
When globulin is high or out of proportion to albumin, a doctor may order protein electrophoresis to see which group of globulins has changed.
Sources:MedlinePlus, Lab Tests Online UK
What can change your globulin result?
Because globulin is calculated, anything that moves total protein or albumin moves it too.
- Dehydration concentrates every blood protein and raises the calculated globulin along with total protein.
- A fall in albumin, with total protein unchanged, makes the calculated globulin look higher and the A/G ratio lower.
- Alpha and gamma globulins generally rise with inflammation and infection.
- Liver disease and kidney disease can lower globulin, and both can also change albumin, which shifts the A/G ratio.
- Some blood cancers such as multiple myeloma, autoimmune diseases such as lupus or rheumatoid arthritis, haemolytic anaemia and tuberculosis are linked with higher globulin.
- A tourniquet left on for a long time can raise total protein and so the calculated globulin.
How do you read globulin on your lab report?
Globulin usually sits under albumin in the protein block of a liver function test, in g/dL, often followed by the A/G ratio. Many reports mark it as calculated, because the lab works it out as total protein minus albumin rather than measuring it.
Read globulin against its own printed range and look at albumin and total protein on the same report, since the three numbers move together. MedlinePlus notes that a low A/G ratio can go with autoimmune disease, liver disease or kidney disease, which is a conversation for your doctor.
Amara reads globulin with the range printed beside it on each report, flags a value outside that range, and shows what changed since your last report. Try it with two sample reports
A sample Amara row for Globulin: 3.7 g/dL on 12 Jan 2026 at Lab A (sample), then 2.9 g/dL on 30 Aug 2026 at Lab B (sample), each with its lab's printed range.
Questions people ask about globulin
How is globulin worked out on a blood report?
Globulin on a routine report is calculated, not measured: the lab subtracts albumin from total protein, and the remainder is printed as globulin. The A/G ratio then divides albumin by that globulin figure. Measuring the individual globulin groups needs a separate test, serum protein electrophoresis, which a doctor orders when the calculated number raises a question.
What does a high globulin result mean on my report?
A high flag means the calculated globulin sits above the range that lab printed. The sources list infection and long-term inflammation, autoimmune diseases, haemolytic anaemia, tuberculosis and some blood cancers as reasons a doctor considers, and dehydration raises every blood protein. Your doctor reads it with albumin, the A/G ratio and your history.
What is the difference between albumin and globulin?
Albumin is one protein, made by the liver, that keeps fluid inside blood vessels and carries hormones, vitamins and medicines. Globulin is a group of many proteins, including antibodies, made partly by the liver and partly by the immune system. Together they make up total protein, with albumin about 60% and globulins about 40%.
Does the A/G ratio matter if globulin is normal?
A/G ratio and globulin are read together rather than alone. The ratio compares albumin with globulin, so it can fall when albumin drops even while globulin stays inside its range. MedlinePlus lists autoimmune disease, liver disease and kidney disease with a low ratio, so a doctor looks at albumin, globulin and the ratio as a set.
Sources
- Total Protein and Albumin/Globulin (A/G) RatioMedlinePlus · medlineplus.gov · Opened
- Liver Function Test (LFT): Order and Check ResultsTesting.com · testing.com · Opened
- Total Protein TestLab Tests Online UK · labtestsonline.org.uk · Opened
- Protein electrophoresis - serumMedlinePlus · medlineplus.gov · Opened
- AlbuminLab Tests Online UK · labtestsonline.org.uk · Opened
About this page
Every statement on this page comes from the sources listed above. Ranges are those commonly printed on Indian lab reports; the range printed on your own report is the one that applies.
Published by Amara Health, a product of MetaNova AI Private Limited, Hyderabad.
Amara Health does not provide medical advice, diagnosis or treatment. Information shown by Amara is based on available health records and may contain errors. Review important information against the original report and consult a qualified healthcare professional for medical decisions. Do not use Amara for medical emergencies.
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