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
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.
Explore the Apex 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.