MetabolicHepatology

Proteins & A/G Ratio

Normal Range
6.0-8.3 g/dL (Total), Ratio: 1.1-2.2
Sample Type
Serum
Fasting
Required
Unit
g/dL

Function

This test measures Total Protein in the blood, which is composed primarily of Albumin and Globulin. The Albumin/Globulin (A/G) ratio is a calculation that compares the amount of albumin (produced by the liver) to globulins (which include enzymes and antibodies produced by the liver and immune system). This balance is critical for maintaining osmotic pressure in the blood and protecting the body from disease.

Why it is Ordered

It is ordered to assess nutritional status and screen for liver or kidney disease. If a patient has edema (swelling), symptoms of liver disease (jaundice), or suspected bone marrow disorders like Multiple Myeloma, this test provides essential diagnostic clues.

Associated Conditions

  • Liver Disease: Cirrhosis or hepatitis often leads to low albumin, resulting in a low A/G ratio.
  • Kidney Disease: Nephrotic syndrome causes the loss of albumin in urine, lowering the ratio.
  • Multiple Myeloma: A cancer of plasma cells that produces excessive globulins, significantly lowering the A/G ratio.
  • Dehydration: Can cause a 'false' increase in total proteins and sometimes a high A/G ratio.

Panel Components

This test is a profile comprising the following specific markers:

Globulin
g/dL
Albumin
g/dL
Total Protein
g/dL
A/G Ratio (Albumin/Globulin Ratio)
ratio

Why Context Matters

The A/G ratio is a calculated value, meaning errors in either the Albumin or Total Protein measurement will compound. High-protein diets can slightly influence results, as can medications like anabolic steroids or growth hormones. Furthermore, hydration status is a major confounding factor—dehydration can make protein levels look artificially high, masking a true deficiency.

Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.

Clinical References

Source-of-truth databases and clinical guidelines for Proteins & A/G Ratio:

Research & Guidelines

Related Indicators

Lipid Profile

View Range

Urine Bicarbonate

View Range

Albumin

View Range
DR

Medically Reviewed by Dr. Binoy Babu, MBBS

Board Certified Doctor • 10+ Years Clinical Experience

Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.

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