ANA (Antinuclear Antibody) Screen, IFA

IMPORTANT: A positive ANA alone does NOT mean you have an autoimmune disease. Up to 15–20% of healthy people (especially women) test positive at low titers (1:40 or 1:80). False positive rates decrease significantly at higher titers (1:160+). The autoimmune community widely reports that ANA titers FLUCTUATE — a positive result can become negative and vice versa, especially at lower titers. If positive, specific antibody testing (anti-dsDNA, anti-Smith, anti-SSA/SSB, etc.) is needed to determine clinical significance. Infections, medications, and other conditions can also cause positive ANA. One positive ANA without symptoms does not require treatment. These notes reflect common patient community experiences.

Reflects common practices in thyroid, BHRT, and functional medicine communities. This may differ from standard clinical guidelines. Not medical advice — always discuss with your provider.