Introduction
The A/G ratio compares albumin to globulin in blood. It often appears on protein or liver panels and may reflect nutrition, liver, kidney, or chronic inflammation.
A low or high ratio is not a specific disease. Total protein, albumin level, and symptoms must be interpreted together.
Why this test is done
A/G Ratio (Albumin-Globulin Ratio) is commonly considered in situations such as:
- Unexplained weakness, swelling, or poor nutrition
- Part of liver or kidney disease workup
- Suspected long-term infection or inflammation
- Supplemental information on routine chemistry panels
- Monitoring when protein levels change over time
How the test is done
- Blood is drawn; albumin and total protein or globulin are measured.
- The ratio is calculated and reported.
- Immunoglobulins or protein electrophoresis may be ordered separately.
- A single ratio cannot confirm a final diagnosis.
Preparation and precautions
- Fasting may be requested with other chemistry tests.
- Report IV fluids or nutritional support you are receiving.
- Provide liver, kidney disease, and medicine lists.
- Bring previous protein reports for comparison.
Understanding results
Your clinician interprets lab or imaging ranges together with your symptoms. Online “normal values” do not always apply to your case.
- Low A/G may reflect low albumin or higher globulin.
- High ratio is less common; lab and context guide meaning.
- Reference ranges vary by laboratory.
- Do not start protein powders or medicines based on the ratio alone.
Risks or limitations
- Minor blood draw risks.
- Dehydration or overhydration can affect protein levels.
- Misinterpretation leading to unnecessary supplements.
After the test
- Review results with your clinician.
- Further liver-kidney panels or urine protein tests may follow.
- Diet changes should be personalized with medical advice.
Frequently asked questions
Does a low A/G ratio mean cirrhosis?
Not necessarily. Malnutrition, kidney protein loss, and inflammation are other causes.
Will eating more protein fix a low ratio?
Not always safe or effective without knowing the cause.
Is albumin the same as A/G ratio?
No. Albumin is one value; A/G is a ratio. Both are viewed in context.
Important caution
This article is general health information. It is not personal medical advice or a prescription.
Your clinician decides whether you need this test, how to prepare, and what the results mean. If you have emergency symptoms, go to hospital without waiting for a lab report.