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  2. Thyroid Health - The Top 10 Thyroid Lab Tests - [SAVE 20%]

Thyroid Health - The Top 10 Thyroid Lab Tests - [SAVE 20%]



Save 20% on The Top 10 Thyroid Lab Tests

Two primary conditions require thyroid testing: hypothyroidism and hyperthyroidism. 

Hypothyroidism occurs when your thyroid isn't producing enough T3 and T4. 

  • Symptoms and signs of hypothyroidism:  Fatigue or weakness; Intolerance to cold; Muscle aches and cramps; Constipation; Weight gain or difficulty losing weight; Poor appetite; Goiter (enlarged thyroid gland); Dry, rough skin; Coarse hair or hair loss; Eye and face swelling; Irregular or heavy menstrual periods; Depression; Memory loss; Slowed thinking and mental activity; and Increased blood cholesterol levels.

Hyperthyroidism is the term for when your body produces too much thyroid hormone. 

  • Symptoms and signs of hyperthyroidism: Nervousness, tremor, agitation; Irritability; Poor concentration; Reduced menstrual blood flow in women; Racing heartbeat or palpitations; Heat intolerance; Changes in bowel habits, such as more frequent bowel movements; Enlargement of the thyroid gland; Skin thinning; Brittle hair; Increase in appetite, feeling hungry; and Sweating. 

If these symptoms sound familiar, you may have an undiagnosed thyroid disorder.

How do you find out? You can order your lab tests directly here to evaluate the health of your thyroid. In addition to the individual thyroid tests, check out the four Thyroid Health panels for added value.


  • Promotion Code:
  • TH20

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  • Ferritin 457
  • Glucose 483
  • Hemoglobin A1c (HgbA1C) 496
  • Insulin 561
  • Iron and Total Iron Binding Capacity (TIBC) 7573
  • Lipid Panel 7600
  • QuestAssureD™ 25-Hydroxyvitamin D (D2, D3), LC/MS/MS 92888
  • Selenium 5507
  • T3, Free 34429
  • T4, Free 866
  • Thyroid Peroxidase and Thyroglobulin Antibodies 7260
  • TSH 899
  • Vitamin B12 (Cobalamin) 927
     
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Thyroid Foundation Panel Thyroid Panel Add-On

  • Ferritin 457
  • Glucose 483
  • Hemoglobin A1c (HgbA1C) 496
  • Insulin 561
  • Iron and Total Iron Binding Capacity (TIBC) 7573
  • Lipid Panel 7600
  • QuestAssureD™ 25-Hydroxyvitamin D (D2, D3), LC/MS/MS 92888
  • Selenium 5507
  • T3, Free 34429
  • T4, Free 866
  • Thyroid Peroxidase and Thyroglobulin Antibodies 7260
  • TSH 899
  • Vitamin B12 (Cobalamin) 927

Thyroid Add-On Panel

  • Reverse T3
  • Comprehensive Metabolic Panel (CMP)
  • CBC (includes Differential and Platelets)
  • T3 Reverse (RT3), LC/MS/MS [ 90963 ]
  • T3 Total [ 859 ]
  • T3, Free [ 34429 ]
  • T4 (Thyroxine), Total [ 867 ]
  • T4, Free [ 866 ]
  • Thyroid Peroxidase and Thyroglobulin Antibodies [ 7260 ]
  • TRAb (TSH Receptor Binding Antibody) [ 38683 ]
  • TSH [ 899 ]
  • TSI (Thyroid Stimulating Immunoglobulin) [ 30551 ]
     
Most Popular
  • T3 Reverse (RT3), LC/MS/MS [ 90963 ]
  • T3 Total [ 859 ]
  • T3, Free [ 34429 ]
  • T4 (Thyroxine), Total [ 867 ]
  • T4, Free [ 866 ]
  • Thyroid Peroxidase and Thyroglobulin Antibodies [ 7260 ]
  • TSH [ 899 ]
  • T3 Total [ 859 ]
  • T3, Free [ 34429 ]
  • T4 (Thyroxine), Total [ 867 ]
  • T4, Free [ 866 ]
  • TSH [ 899 ]
  • T4, Free [ 866 ]
  • TSH [ 899 ]
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The free T4 are tests thelps evaluate thyroid function. The free T4 test is used to help diagnose hyperthyroidism and hypothyroidism. Free T4 is the active form of thyroxine and is usually ordered along with or following a TSH test. This helps the doctor to determine whether the thyroid hormone feedback system is functioning as it should, and the results of the tests help to distinguish between different causes of hyperthyroidism and hypothyroidism.
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The Thyroid-stimulating Hormone (TSH) Blood Test is for differential diagnosis of primary, secondary, and tertiary hypothyroidism. The TSH test is also useful in screening for hyperthyroidism. This assay allows adjustment of exogenous thyroxine dosage in hypothyroid patients and in patients on suppressive thyroxine therapy for thyroid neoplasia.

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This test is used to diagnose hyperthyroidism and to clarify thyroid status in the presence of a possible protein binding abnormality.
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For diagnosis of hypothyroidism and hyperthyroidism.

Note: Free T4 Index (T7) will only be calculated and reported if test code code 861 (T3 Uptake) is ordered as well.

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Total T3 measurements are used to diagnose and monitor treatment of hyperthyroidism and are essential for recognizing T3 toxicosis
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The assay may be useful in the diagnosis of nonthyroidal illness (NTI). Patients with NTI have low T3 concentrations and increased concentrations of rT3. RT3 may be useful in neonates to distinguish euthyroid sick syndrome from central hypothyroidism.
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Thyroid Peroxidase Antibodies (TPO) and Thyroglobulin Antibodies

Measurement of thyroglobulin antibodies and thyroid peroxidase antibodies (TPO) is useful in the diagnosis and management of a variety of thyroid disorders including autoimmune thyroiditis, Hashimoto's Disease, Graves Disease and certain types of goiter.

 "IMPORTANT - Please note that Quest returns values up to 900 for the Thyroid Peroxidase Antibodies test.  If tracking requires values above 900 for the Thyroid Peroxidase Antibodies, then order test TPO Antibody Endpoint (Test Code # 15116).

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TSI stands for thyroid stimulating immunoglobulin. TSI tells the thyroid gland to swell and release excess amounts of thyroid hormone into the blood.