ANA Test (Antinuclear Antibodies)
A blood test for antibodies that can be a sign of autoimmune diseases such as lupus.
Quick Summary
To help diagnose lupus and other autoimmune conditions.
Antinuclear antibodies and their pattern and strength (titre).
No preparation needed.
Overview
A positive ANA is common in healthy people, especially at low levels.
It supports a diagnosis only together with symptoms and other tests.
What It Measures
ANA titre and pattern
Strength and type of antibodies.
How It's Performed
- 01
Preparation
Usually no special preparation. Tell the staff about medicines you take.
- 02
Blood sample
A small amount of blood is taken from a vein in your arm with a thin needle.
- 03
Afterwards
Press on the spot for a minute. A small bruise is common; you can go back to normal activities.
Interpreting Results & Next Steps
Discuss with Doctor
A negative result makes lupus unlikely. Normal ranges differ between laboratories, ages and sexes; always use the range printed on your report and ask your doctor what your results mean.
If values are High:
A positive result, especially at high titres, may suggest an autoimmune disease.
Sources and further reading
Last updated 21 October 2026. For more detail, see these trusted health organisations.
- ANA (Antinuclear Antibody) Test(opens in a new tab) · MedlinePlus, US National Library of Medicine