Evidence-Based Supplement & Herb Guides

Anti-C1q Antibody Test: Lupus Nephritis Risk, Positive Result, and Meaning

Learn what a positive anti-C1q antibody test may mean for lupus nephritis risk, how results are interpreted, and which kidney and lupus tests guide follow-up.

The anti-C1q antibody test looks for autoantibodies that target C1q, a protein that helps the complement immune system clear immune complexes and damaged cells....

Anti-Centromere Antibody Test: Limited Scleroderma, CREST Syndrome, and Meaning

Understand what a positive anti-centromere antibody test means, its link to limited scleroderma and CREST, and the heart, lung, and vascular follow-up that may be needed.

The anti-centromere antibody test looks for autoantibodies against proteins in the centromere, the part of a chromosome that helps it separate during cell division....

Anti-Chromatin Antibody Test: Lupus Marker, Positive Result, and Disease Activity

Learn what a positive anti-chromatin antibody test may mean for lupus, how it relates to anti-nucleosome antibodies and disease activity, and which follow-up tests matter.

The anti-chromatin antibody test detects autoantibodies against chromatin, the package of DNA and proteins found inside the cell nucleus. These antibodies are strongly associated...

Anti-Double-Stranded DNA (Anti-dsDNA) Test: Lupus Activity, Kidney Risk, and Meaning

Learn how anti-dsDNA test methods affect results, what positive and negative values mean for lupus activity, and how the test relates to kidney risk and follow-up.

The anti-double-stranded DNA test detects autoantibodies that bind to double-stranded DNA, the genetic material inside cell nuclei. Anti-dsDNA antibodies are among the most specific...

Anti-Fibrillarin (U3 RNP) Antibody Test: Systemic Sclerosis Marker and Meaning

Understand what a positive anti-fibrillarin or U3 RNP antibody test means, how it supports systemic sclerosis, and which organ risks and follow-up tests matter.

The anti-fibrillarin antibody test looks for autoantibodies against fibrillarin, a protein in the U3 small nucleolar ribonucleoprotein complex. The antibody is also called anti-U3...

Anti-Histone Antibody Test: Drug-Induced Lupus, Positive Result, and Meaning

Learn what a positive anti-histone antibody test means, how it supports drug-induced lupus, which medicines and symptoms matter, and why results are not diagnostic alone.

The anti-histone antibody test detects immune proteins that bind histones, the proteins around which DNA is packaged inside the nucleus. It is most often...

Anti-HMGCR Antibody Test: Statin-Associated Necrotizing Myopathy and Meaning

Learn how the anti-HMGCR antibody test identifies statin-associated necrotizing myopathy, how results differ from common statin aches, and what follow-up matters.

The anti-HMGCR antibody test helps diagnose an autoimmune muscle disease called anti-HMGCR immune-mediated necrotizing myopathy. HMGCR is the enzyme targeted by statin cholesterol medicines,...

Anti-Jo-1 Antibody Test: Antisynthetase Syndrome, Myositis, and Lung Disease

Understand what a positive anti-Jo-1 antibody means, how antisynthetase syndrome affects muscles, joints, and lungs, and which tests and monitoring are important.

The anti-Jo-1 antibody test detects autoantibodies against histidyl-transfer RNA synthetase, an enzyme involved in protein production. Anti-Jo-1 is the most common antisynthetase antibody and...

Anti-Ku Antibody Test: Connective Tissue Disease Overlap and Meaning

Learn what a positive anti-Ku antibody test means, why it is linked to connective tissue disease overlap, and how assay quality, muscle disease, and lung risk are evaluated.

The anti-Ku antibody test detects autoantibodies against the Ku70/Ku80 protein complex, which helps repair double-stranded DNA breaks. Anti-Ku is uncommon and does not point...

Anti-MDA5 Antibody Test: Dermatomyositis, Lung Disease Risk, and Meaning

Learn what a positive anti-MDA5 antibody test means, how it relates to amyopathic dermatomyositis and lung risk, and which warning signs and monitoring tests matter.

The anti-MDA5 antibody test identifies autoantibodies against melanoma differentiation-associated protein 5, an intracellular sensor of viral RNA. A convincing positive result strongly supports an...

Anti-Mi-2 Antibody Test: Dermatomyositis Marker and Meaning

Understand what a positive anti-Mi-2 antibody test means, how it supports dermatomyositis diagnosis, typical skin and muscle findings, test limitations, treatment, and follow-up.

The anti-Mi-2 antibody test looks for an immune protein strongly associated with dermatomyositis, an autoimmune disease that can inflame skin and skeletal muscle. A...

Antinuclear Antibody (ANA) Test for Lupus: Positive, Negative, Titer, and Pattern

Learn how to interpret an ANA test for lupus, including positive and negative results, titers, common patterns, method differences, follow-up tests, and limitations.

The antinuclear antibody test is the most sensitive blood screening test for systemic lupus erythematosus, but it is not a lupus diagnosis. More than...

Anti-Nucleosome Antibody Test: Lupus Activity, Positive Result, and Meaning

Learn what a positive anti-nucleosome antibody test means in lupus, how it relates to disease activity and kidney risk, and why urine, complement, and anti-dsDNA results matter.

The anti-nucleosome antibody test detects immune proteins directed against nucleosomes, the DNA-and-histone units that package genetic material inside cells. These antibodies are strongly associated...

Anti-NXP2 Antibody Test: Dermatomyositis Marker, Muscle Disease, and Meaning

Understand what a positive anti-NXP2 antibody test means, including its links with dermatomyositis, severe muscle weakness, dysphagia, edema, calcinosis, testing limits, and adult cancer screening.

The anti-NXP2 antibody test helps identify a dermatomyositis subgroup that can have substantial muscle weakness, swallowing problems, tissue swelling, and calcinosis. NXP2 stands for...

Anti-PM/Scl Antibody Test: Myositis, Scleroderma Overlap, and Meaning

Learn what a positive anti-PM/Scl antibody test means, including myositis–scleroderma overlap, PM/Scl-75 and PM/Scl-100, lung disease, weakness, testing limits, and follow-up.

The anti-PM/Scl antibody test helps identify an autoimmune overlap pattern that can combine inflammatory muscle disease with features of systemic sclerosis, also called scleroderma....

Anti-Ribosomal P Antibody Test: Lupus Marker, Neuropsychiatric Risk, and Meaning

Understand what a positive anti-ribosomal P antibody test means in lupus, its debated link with psychosis and other neuropsychiatric symptoms, liver associations, limitations, and follow-up.

The anti-ribosomal P antibody test detects autoantibodies against three related proteins on the large ribosomal subunit. These antibodies are uncommon but relatively specific markers...

Anti-RNA Polymerase III Antibody Test: Scleroderma, Kidney Crisis Risk, and Meaning

Understand what a positive anti-RNA polymerase III antibody test means, including systemic sclerosis, rapid skin progression, renal crisis risk, cancer timing, blood-pressure monitoring, and urgent warning signs.

The anti-RNA polymerase III antibody test is a highly specific marker for systemic sclerosis, also called scleroderma. A positive result often points toward a...

Anti-RNP Antibody Test: Mixed Connective Tissue Disease, Lupus, and Meaning

Understand what a positive anti-RNP antibody test means in MCTD, lupus, and overlap disease, including assay limits, lung risks, follow-up tests, and next steps.

An anti-RNP antibody test looks for immune proteins directed against ribonucleoproteins, especially the U1 small nuclear ribonucleoprotein complex. A strong anti-U1 RNP result can...

Anti-Ro52 Antibody Test: Autoimmune Disease, Myositis, Lung Disease Risk, and Meaning

Learn what a positive anti-Ro52 antibody test means, how it differs from Ro60, and when myositis, interstitial lung disease, or pregnancy follow-up matters.

An anti-Ro52 antibody test detects immune reactivity against Ro52, a protein also called TRIM21. The result can appear in many autoimmune conditions, including inflammatory...

Anti-Ro60 Antibody Test: Lupus, Sjogren Syndrome, Positive Result, and Meaning

Understand what a positive anti-Ro60 antibody test means for lupus, Sjögren syndrome, photosensitive skin disease, pregnancy risk, and follow-up testing.

An anti-Ro60 antibody test looks for immune proteins directed against Ro60, an RNA-binding protein involved in cellular RNA quality control and stress responses. The...