Anti-SS-B Ab
Here’s what it reflects — and what to do about it.
Longetic pulls together every lab and record you’ve had, follows how Anti-SS-B Ab changes over time, and explains what’s shifting — so you walk into your next appointment prepared, with reminders for retests along the way.
What is Anti-SS-B Ab?
Antibodies (anti-La) targeting a nuclear protein, most often associated with Sjögren's syndrome and often seen with anti-Ro.
Anti-SS-B (anti-La) antibodies target a ribonucleoprotein involved in RNA processing and are closely linked to Sjögren's syndrome, a condition affecting the glands that produce tears and saliva. They are less common than anti-Ro antibodies but, when both are present together, more strongly support a Sjögren's-related process. Anti-SS-B antibodies can also appear in lupus and, similar to anti-Ro, are relevant during pregnancy due to a small associated risk of fetal heart rhythm changes. Clinicians typically order this test alongside anti-Ro and ANA when dryness, joint symptoms, or lupus-like features are present. A positive result is one clue interpreted together with symptoms and other antibody findings.
Lifestyle factors that influence this marker
- Aim for a balanced, anti-inflammatory eating pattern with plenty of vegetables, fruit, and healthy fats
- Stay well hydrated throughout the day
- Stay physically active with regular moderate exercise
- Prioritize consistent, restorative sleep
- Practice stress-management techniques
- Avoid smoking
Tests often checked alongside this
- Anti-Ro (SS-A) Ab — most often tested and positive together
- ANA Pattern and ANA Titer — commonly reviewed alongside
- Complement C3 and C4 — may be checked in suspected lupus overlap
How this can show up in how you look and feel
- May be associated with dry eyes or dry mouth
- May be associated with joint pain or stiffness
- May be associated with fatigue
What can affect this marker
- Age
- Sex
- Pregnancy
- Medications
- Lab variability between testing methods
What to track over time
- Whether antibody levels remain stable on repeat testing
- How results align with dryness and joint symptoms over time
- Whether monitoring is considered during pregnancy
What to ask your doctor
- How does this result relate to my anti-Ro result and my symptoms?
- Does this finding have any relevance if I am pregnant or planning a pregnancy?
- Should I also be evaluated for Sjögren's syndrome or lupus?
- Is any follow-up testing recommended?
This glossary entry is for informational purposes only and is not a substitute for professional medical advice. Read our Terms of Use.
References
About our sources
Official sources
Government health agencies, national institutes, and intergovernmental bodies whose guidelines carry regulatory or policy weight.
Clinical / professional
Medical societies, specialty colleges, and professional associations whose consensus statements reflect clinical practice standards.
Peer-reviewed research
Original research articles and systematic reviews published in indexed journals and verified through PubMed or DOI.