Thyroglobulin antibodies are antibodies that recognize and bind to thyroglobulin, interfering with its function. Thyroglobulin is critical for thyroid hormone production, so thyroglobulin antibodies usually indicate thyroid disease. The thyroglobulin antibodies test is usually ordered after thyroid abnormalities have been detected with some other testing, such as TSH and free T4. It is ordered along with TPO antibody testing.
Thyroglobulin Ab optimal range: 0-0.9 IU/mL
Sources:
https://www.mayomedicallaboratories.com/test-catalog/Clinical+and+Interpretive/84382
http://www.uptodate.com/contents/diagnosis-of-and-screening-for-hypothyroidism-in-nonpregnant-adults
http://www.ncbi.nlm.nih.gov/pubmed/10634366
http://www.ncbi.nlm.nih.gov/pubmed/15320974
http://www.uptodate.com/contents/thyroid-hormone-synthesis-and-physiology
The thyroglobulin antibody level cannot be too low.
Thyroglobulin antibodies are autoantibodies, which means the body mistakenly produces these antibodies that act against a normal protein, thyroglobulin. As such, thyroglobulin antibodies usually indicate an autoimmune disease. Thyroglobulin antibodies are present in roughly 90% of people with Hashimoto's thyroiditis and in half to three-quarters of people with Graves' disease. Thyroglobulin antibodies may be detectable in people without symptoms of thyroid hormone imbalance (subclinical hypothyroidism). When hypothyroidism causes symptoms, it may cause weakness and fatigue, cold intolerance, shortness of breath, weight gain, constipation, cognitive problems, dry skin, hoarseness, and swelling (edema).
Some specific causes of thyroglobulin antibodies are:
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5-Methyltetrahydrofolate, Adiponectin, Albumin/Creatinine Ratio, Random Urine, C-Peptide, Serum, Ceruloplasmin, Cyclic AMP, Plasma, Dihydrotestosterone (female), Dihydrotestosterone (male), Estimated Average Glucose (eAG), Free Androgen Index, Free testosterone, Free Testosterone, Direct (Female), Free Testosterone, Direct (Male), Free Thyroxine, Free Thyroxine Index, Fructosamine, Glucose, Glutamic Acid Decarboxylase, Hemoglobin A1c (HbA1c), Homocysteine, Insulin (Fasting), Insulin Antibody, Insulin-Like Growth Factor I (IGF-1), Iodine, Serum/Plasma, Parathyroid Hormone (PTH), Serum, Pregnenolone, Reverse T3, Serum, Sex Hormone-Binding Globulin (SHBG), T3, Free, T4, Free, T4, Total (Thyroxine), T7 Index, Testosterone, Testosterone (Female/Child), Testosterone, Serum (Female), Thyroglobulin, Thyroglobulin Antibodies, Thyroid Peroxidase Antibodies (Anti-TPO Ab), Thyroid Stim Immunoglobulin, Thyroid-Stimulating Hormone (TSH), Thyrotropin Receptor Ab, Serum, Thyroxine-binding globulin, TBG, TMAO (Trimethylamine N-oxide), Total T3, Tri iodothyronine (T3) Uptake, Triiodothyronine, Serum
