Albumin/Globulin Ratio
Albumin divided by globulin, a quick summary of the protein balance in blood.
| Typical reference range | 1–2.5 ratio |
Ranges vary by laboratory, method, age and sex: always use the range printed on your own report. Why labs differ.
What it measures
The A/G ratio compares albumin to globulins. Normally there is somewhat more albumin than globulin.
Why it matters
Shifts in the ratio help identify whether a protein abnormality is due to changes in albumin or in globulins, pointing toward liver, kidney, nutritional or immune causes.
What a high result can mean
A high ratio can reflect low globulins (immunodeficiency) or, less commonly, high albumin from dehydration.
What a low result can mean
A low ratio can result from high globulins (inflammation, autoimmune disease, multiple myeloma) or low albumin (liver disease, kidney loss, malnutrition).
What affects the result
A derived value; always look at albumin and globulin individually.
Unit
Usually reported in ratio.
Also called on lab reports
A/G Ratio, Albumin/Globulin (A/G) Ratio, AG Ratio, A:G Ratio, Albumin/Globulin
Related tests: Blood Proteins
This page is educational and does not replace advice from a healthcare professional.