The Thyroid-stimulating Hormone (TSH) Test is a blood test used to evaluate thyroid function and diagnose thyroid disorders such as hyperthyroidism (overactive thyroid) and hypothyroidism (underactive thyroid). The pituitary gland produces TSH and helps the thyroid gland in producing T3 and T4 hormones, which help control metabolism, temperature and heart rate. Some conditions of hypothyroidism are fatigue, weight gain, numbness or cold intolerance and a short attention span. Some conditions associated with hyperthyroidism are weight loss, vomiting, increased blood pressure, hair loss or increased heart rate.
Recommended for: Diagnosing and monitoring treatment of thyroid disorders such as hypothyroidism or hyperthyroidism.
Estimated turnaround time: 2 days
Additional notes: If you are currently taking a thyroid hormone, it is recommended you get your blood drawn prior to taking your daily dose. Otherwise, no special preparation is needed.
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