Quest Diagnostics Thyroid Disorder Nutrient Deficiency Test Panel
Type
Blood Testing
Biomarkers
9
Duration
30 min
Results
48 hours
Comprehensive blood test to measure 5 nutrients potentially affected by thyroid disorders.
This panel measures vitamin D, iodine, ferritin, iron, and selenium levels in your blood. Thyroid disorders like hypothyroidism and Hashimoto's can hinder nutrient absorption. Testing helps you and your doctor determine if supplementation is needed to improve thyroid health and overall well-being. Addressing deficiencies is crucial for better health, as your body doesn't produce most vitamins and minerals. This test provides insights into your nutritional status and informs treatment decisions.
Key Details
- Biomarkers
- 2–7 thyroid markers
- Fasting Required
- No
- Sample Type
- Blood draw
- Turnaround
- 24–48 hours
- Common Use
- Thyroid function, autoimmune screening
Who Is This For?
Anyone experiencing unexplained fatigue, weight changes, hair loss, cold sensitivity, or mood disturbances. People with a family history of thyroid disease or autoimmune conditions. Women planning pregnancy, as thyroid function is critical for fetal brain development. Anyone who has had a 'normal' TSH result but still suspects thyroid dysfunction.
What's Included
Preparation Required
No fasting required for a standalone thyroid panel. If you take thyroid medication (levothyroxine/Synthroid), take your dose after the blood draw, not before — taking it beforehand can temporarily spike T4 levels and skew results. Morning testing is recommended for the most consistent TSH readings, as TSH follows a circadian rhythm and peaks overnight.
Biomarkers Tested
9The best indicator of overall vitamin D status. Vitamin D is essential for calcium absorption, bone health, immune function, and mood regulation. Deficiency is extremely common, especially in northern latitudes, and linked to increased disease risk.
Iodine is an essential trace element and an integral component of thyroid hormones. Thyroid hormones are required for normal growth and development of tissues and maturation of our bodies. Approximately 80% of iodine is excreted in the urine, making it a good marker of the previous day's intake.
The primary iron storage protein. Ferritin reflects total body iron stores and is the first marker to drop in iron deficiency. However, ferritin also rises with inflammation, infection, and liver disease, which can mask true iron deficiency.
A mineral essential for oxygen transport (in hemoglobin), energy production, and immune function. Serum iron measures the amount circulating in blood, but ferritin and TIBC provide a more complete picture of iron status.
A trace mineral crucial for thyroid hormone metabolism, antioxidant defense (via selenoproteins), and immune function. Selenium deficiency can impair thyroid function and increase susceptibility to viral infections.
Essential for thyroid hormone production and overall metabolic regulation.
The primary screening test for thyroid function. TSH is produced by the pituitary gland to regulate thyroid hormone production. High TSH indicates an underactive thyroid (hypothyroidism), while low TSH suggests an overactive thyroid (hyperthyroidism).
The unbound, active form of the main thyroid hormone T4. Free T4 directly reflects thyroid gland output and is used alongside TSH to diagnose and monitor thyroid disorders.
The active form of thyroid hormone responsible for regulating metabolism, energy, and body temperature. Free T3 is converted from T4 in tissues and is three to four times more potent than T4.
+ $6.00 Physician Service Fee; Klarna/Affirm payment options available
- Category
- Diagnostic
- Sample Type
- Blood draw
- Duration
- 30 min
- Results
- 48 hours