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Anti-MAG Antibodies

Published: July 27, 2026Updated: August 25, 2026

Anti-MAG antibodies are used to detect the presence of antibodies against myelin-associated glycoprotein (MAG) in the blood, which is often associated with certain types of peripheral neuropathies.

Quick summary

Anti-MAG antibodies help diagnose neuropathy related to MAG autoimmunity.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 25, 2026Editorial policy

Key facts at a glance

Units
Bühlmann ratio
Clinical utility
diagnostic
Result kind
qualitative
FDA-cleared
Roche Anti-MAG, Siemens Anti-MAG, Buhlmann Anti-MAG
interpretation: {"text":"0–1 Bühlmann ratio indicates no significant anti-MAG antibodies detected.","label":"Normal"}; {"text":"Values above 1 suggest the presence of anti-MAG antibodies, potentially indicating neuropathy.","label":"Elevated"}

Anti-MAG antibodies are a specific type of autoantibody that target myelin-associated glycoprotein (MAG), a protein crucial for maintaining the integrity of the myelin sheath in the peripheral nervous system.

Elevated levels of anti-MAG antibodies in the blood are indicative of an autoimmune response that can lead to demyelination and subsequent neurological symptoms, such as sensory loss and muscle weakness.

The Bühlmann ratio is a standardized measure used to quantify the levels of anti-MAG antibodies, with a reference range of 0–1 indicating normal levels and higher values suggesting potential neuropathy.

Frequently asked questions

What conditions are associated with elevated anti-MAG antibodies?
Elevated anti-MAG antibodies are often associated with demyelinating neuropathies, such as MAG neuropathy and certain types of chronic inflammatory demyelinating polyneuropathy (CIDP).
How is the anti-MAG antibody test performed?
The test is performed through a blood sample, which is then analyzed using immunoassay techniques to measure the levels of anti-MAG antibodies.
  1. 1
    Anti-MAG Neuropathy: Clinical and Therapeutic AspectsSource
  2. 2
    Bühlmann Laboratories AG - Anti-MAG Antibody TestingSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

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Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy