The dilution at which ANA antibodies remain detectable — higher titers carry more significance.
What is it
The ANA titer is the highest dilution at which antibodies remain detectable (e.g., 1:80, 1:160, 1:320). Higher titers carry greater clinical significance in published research.
Why it's measured
Higher titers have been associated with greater likelihood of an underlying autoimmune condition in research literature.
Reference range
Standard laboratory reference
< 1:80 titer
Reference ranges vary by laboratory. Your individual reference range will appear on your test report and should be interpreted by your physician in the context of your overall health profile.
What results may indicate
Elevated
Higher titers warrant clinical evaluation in the context of symptoms and other markers.
Lower
Low or negative titers are generally considered favorable.
These associations are general. They are not a personal diagnosis or prediction. Discuss your individual results with your physician in the context of your full health profile.
When it's measured
Reported when the ANA screen is positive.
Related markers
Common questions
The ANA titer is the highest dilution at which antibodies remain detectable (e.g., 1:80, 1:160, 1:320). Higher titers carry greater clinical significance in published research.
It's one of the markers used to build a fuller picture of your health. On its own it tells you very little, so it's most informative when reviewed alongside related markers.
It's measured from a standard blood draw at Quest or LabCorp. ANA Titer is one of the markers included in the OPTML Apex Panel, where your results are read across systems and reviewed by a U.S.-licensed physician.
Reference ranges vary by laboratory, and a single value rarely tells the whole story. Review your result with a physician in the context of your other markers, symptoms, and history.
ANA Titer is one signal among many. Answer a few quick questions and we’ll point you to the panel that fits.
Measured in
A complete look at your heart, hormones, metabolism, inflammation, and longevity systems — drawn at Quest or LabCorp, reviewed by a U.S.-licensed physician.
Find the right panel →This information is for general educational purposes only and is not medical advice. Lab results alone are not intended to diagnose, treat, or cure any condition and do not replace the advice of a healthcare provider. OPTML does not offer medical advice, a diagnosis, medical treatment, or any form of medical opinion.
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