What is globulin?
Your blood carries dozens of proteins, and they fall into two groups. Albumin, more than half, is made by your liver: it keeps fluid in the vessels and carries hormones, fatty acids and medicines. Everything that is not albumin is together called globulin, and that is a mixed company: transport proteins such as transferrin for iron and the proteins that bind thyroid hormone and sex hormones, clotting proteins, the proteins that rise during inflammation, and the antibodies, the immunoglobulins, which your immune system makes and which form the largest part. Globulin is not measured separately. Your total protein and your albumin are determined, and the difference is the globulin fraction. That has a consequence: every movement in the total that does not come from albumin lands in globulin, and the number does not say which of the dozens of proteins it was. Anyone who wants to know has a protein electrophoresis done, which splits the fraction into alpha, beta and gamma, or has the antibodies measured separately as IgG, IgA and IgM. Your report prints globulin in g/L, or you calculate it yourself with the calculator on this page. Because it is a subtraction, nobody publishes a band for it; calculated from the middle of the bands for total protein and albumin, a healthy adult comes out around 26.5 to 33.5 g/L. Anyone who drinks normally and has no inflammation usually sits in there.
Why is globulin relevant?
Albumin and globulin come from different corners of your body. Albumin is made by your liver; the largest part of the globulins is made by your immune system. The split therefore shows which side is moving, and that is precisely what total protein hides: a normal total can conceal a falling albumin that is filled up by a rising globulin, the picture of a long-standing inflammation or a liver disease. The second reason is that a high globulin is one of the few clues in ordinary blood to an inflammation or infection that has been smouldering for months, or to a liver that is forming scars and in which the antibodies rise. Rarely the reason is a single cell line in the bone marrow making one abnormal protein in large quantities, and then the protein electrophoresis is the test that shows it. The honest limitation is that globulin is a coarse number. It responds most strongly to how concentrated your blood was that morning: arriving dehydrated at the draw lifts it, drinking a lot lowers it, and that is by far the most common explanation for an outlier. There is no band, so your own course is the reference point, and the meaning lies in what albumin and total protein do beside it.
How globulin is worked out
What counts beside the number:
- Your albumin, because the question is which half of total protein moved
- Your total protein, because globulin is the subtraction and moves with every shift that does not come from albumin
- How much you drank in the days before, because dehydration lifts it and drinking a lot lowers it
- Your CRP and ESR, because those show whether an inflammation sits behind a high globulin
- Your liver values, because a liver with scars lets the antibodies rise
- Your earlier results, because without a band your own course is the reference point
None of the four labs publishes a band for globulin, and that follows from what it is: a subtraction and not a measurement. What they do publish are the bands for total protein and albumin, and from those it can be calculated where the subtraction normally lands. Take the middle of both bands per lab and subtract them: then the four labs come out between 26.5 and 33.5 g/L. That is not a published band but our own calculation on their figures, and the best reference point there is. Anyone who wants to know which protein in the fraction moved has a protein electrophoresis done; Unilabs once published separate fractions for it, 2 to 5, 4 to 9, 5 to 10 and 7 to 15 g/L, but no longer reports them.
globulin = total protein − albumin, both in g/l
There is no constant to account for: subtracting is subtracting. Both figures come from the same tube of blood, so globulin is not a separate analysis but a sum worked out afterwards. What sits underneath it, the separate alpha, beta and gamma fractions, only comes into view with protein electrophoresis.
g/l
− =
Globulin high or low: what it means
A low globulin usually means your blood was diluted. The most common explanation first: dilution by fluid, after drinking a lot, an infusion or in pregnancy, where albumin and total protein fall just as hard; protein loss through the kidneys, where mainly the smaller globulins leak away together with albumin and the urine foams; and rarely an immune system that makes too few antibodies, inborn or through medicines, with recurring infections as the hallmark. A low globulin with a normal albumin is almost always harmless. A high globulin means a concentrated sample or more protein from the immune system. Usually it is the first and rarely the last: dehydration, where albumin rises just as hard and the ratio stays the same; a long-standing inflammation or infection, where the immune system makes antibodies and inflammatory proteins for months while albumin falls; a chronic liver disease, where the antibodies rise because the liver clears them less; and rarely an abnormal protein from a single cell line in the bone marrow, visible as a peak on a protein electrophoresis. What you do about it: drink normally in the days before a draw, because a concentrated sample lifts both halves and a diluted sample lowers them. If globulin is high while albumin is low, the question is where the inflammation sits: gums, gut, joints, a smouldering infection, or a liver processing too much alcohol or fat. If it stays high without explanation, a protein electrophoresis is the next step, which shows which fraction it is. Read globulin beside albumin and total protein, because the question is which half moved, beside CRP and ESR, which show whether an inflammation is at play, and beside the albumin/globulin ratio, which says independently of your fluid balance how the two relate.
What lowers it
Usually a diluted sample, and rarely an immune system that makes too little.
| Cause | How often |
|---|---|
| Dilution by fluidDrinking a lot, an infusion or pregnancy dilute your blood, and albumin and total protein fall just as hard with it | Often |
| Protein loss through the kidneysWith leaking kidney filters mainly the smaller half of the globulins leaves the body together with albumin; foaming urine is the clue | Sometimes |
| Reduced antibody productionInborn or through medicines that suppress the immune system; the hallmark is recurring infections | Rare |
What raises it
A concentrated sample, or more protein from the immune system.
| Cause | How often |
|---|---|
| DehydrationA concentrated sample lifts both halves of total protein, and the ratio with albumin stays the same | Often |
| Long-standing inflammation or infectionThe immune system makes antibodies and inflammatory proteins for months, while albumin falls; the ratio shifts | Sometimes |
| Chronic liver diseaseA liver with scars clears fewer antibodies from the gut, so they rise in the blood while albumin falls | Sometimes |
| An abnormal protein from a single cell lineOne cell line in the bone marrow makes one protein in large quantities; the protein electrophoresis shows it as a peak | Rare |
How does a globulin blood test work?
- Referral
- Not needed, and there is no separate request: globulin follows from total protein and albumin, two tests you get anyway. You calculate it with the calculator on this page.
- Fasting
- Not needed. Neither input value moves with what you ate.
- When
- On an ordinary day, having drunk normally and not during or just after an infection, because then you measure the response of your immune system.
- The draw
- One tube of blood from a vein in your arm; albumin and total protein come from the same sample. Do not sit long with a tourniquet, because that too concentrates the blood.
- Repeating
- Only when there is a reason. If globulin stays high without explanation, the follow-up is a protein electrophoresis that splits the fraction into alpha, beta and gamma.
- Which test
- Globulin is in the comprehensive test (€229) and in .
- Where to draw
- You can draw at 250+ locations near you, no referral needed. See the locations
Frequently asked questions
What is globulin?
Everything in your blood protein that is not albumin: transport proteins for iron and hormones, clotting proteins, the proteins that rise during inflammation, and above all the antibodies your immune system makes. It is not measured but calculated, total protein minus albumin, and so it is the half of your blood protein that does not come from your liver.
What is a normal globulin value?
There is no band, because it is a subtraction. Calculated from the middle of the bands for total protein and albumin, a healthy adult comes out around 26.5 to 33.5 g/L, and anyone who drinks normally and has no inflammation usually sits in there. More important than the number is whether it was your fluid balance or your immune system that moved, and you read that from your albumin beside it.
What does a high globulin mean?
Usually that your blood was concentrated: arriving dehydrated at the draw lifts both halves, and albumin then rises with it. If globulin rises while albumin falls, your immune system is making more protein: an inflammation or infection that has been smouldering for months, in gums, gut or joints, or a liver with scars that clears the antibodies less. Rarely one cell line in the bone marrow makes one abnormal protein, and a protein electrophoresis shows that.
What does a low globulin mean?
Usually that your blood was diluted, after drinking a lot, an infusion or in pregnancy, and then albumin falls just as hard with it. Sometimes the smaller globulins leak away together with albumin through the kidneys, and then the urine foams. Rarely your immune system makes too few antibodies, inborn or through medicines, and then recurring infections are the hallmark. A low globulin with a normal albumin is almost always harmless.
What if my globulin is high but I feel fine?
First look at your albumin and how much you drank in the days before. If albumin rises with it, the sample was concentrated and drinking and a repeat draw are enough. If albumin falls while globulin rises, a smouldering inflammation sits somewhere, and then CRP and ESR belong with it. If it stays high without explanation, a protein electrophoresis is the next step, which shows which fraction it is.
Is globulin the same as immunoglobulin?
No, though the one sits inside the other. Immunoglobulins are the antibodies, IgG, IgA and IgM, and they form the largest part of the globulin fraction. But globulin also contains transport proteins, clotting proteins and inflammatory proteins. If you only want to know the antibodies, you have those measured separately.
How do I calculate my own globulin?
Subtract your albumin from your total protein, both in g/L and from the same draw. If your total protein is 72 and your albumin 42, your globulin is 30. The calculator on this page does the same sum.
Do I need to fast?
No. Neither input value moves with what you ate. What does count is how much you drank: do not arrive dehydrated at the draw and do not drink extra much either, because both shift the number without anything changing about your proteins.
Which tests include globulin?
Globulin is in .
Related biomarkers
Sources
- 1.Unilabs, determination guide: protein electrophoresis. 2026. bepalingenklapper.nl
- 2.Unilabs, determination guide: total protein. 2026. bepalingenklapper.nl
- 3.Star-shl, determination guide: protein electrophoresis. 2026. star-shl.nl
- 4.Certe, determination guide: total protein. 2026. bepalingenwijzer.certe.nl
- 5.Clinical Diagnostics, laboratory guide: protein screening. 2026. clinicaldiagnostics.nl
Educational information only, not medical advice. Consult a healthcare professional for clinical decisions.
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