Low Anti-mitochondrial antibody (AMA): what it means
A Anti-mitochondrial antibody (AMA) result below the normal range is considered low. Here is what a reduced Anti-mitochondrial antibody (AMA) can point to, and when it is worth discussing with a doctor.
Reference range: <20 U/mL (negative) is normal; the hallmark antibody of primary biliary cholangitis and read together with cholestatic liver enzymes
Understand your full resultWhat a low Anti-mitochondrial antibody (AMA) can mean
- Negative — the expected, normal result; makes PBC much less likely.
- AMA-negative PBC — a minority of people have PBC despite a negative AMA, diagnosed with other antibodies or a biopsy.
When to discuss with a doctor
AMA is usually requested when liver blood tests show a cholestatic pattern — a raised alkaline phosphatase and GGT — or to investigate unexplained tiredness and itching, particularly in a woman in middle age. A positive AMA in that setting strongly supports primary biliary cholangitis and leads to specialist assessment, because early treatment (usually with a bile-acid medication) protects the liver and greatly improves the long-term outlook. Because a small number of people have PBC with a negative AMA, a strongly cholestatic picture is still investigated even if AMA is negative. Mediora.AI shows AMA alongside alkaline phosphatase, GGT and IgM so the primary biliary cholangitis pattern is visible; the diagnosis and treatment belong with your doctor and a liver specialist.
Keep reading
One value is a snapshot. Upload the full test to see every marker explained together.
Upload your test - freeMediora.AI is informational - interpretation, not a diagnosis. A single out-of-range value is common and often benign; always discuss decisions with your doctor.