Thyroid Function Test

Thyroid Function Test

Thyroid function tests are a series of blood test used to measure how well your thyroid gland is working.

TSH is a hormone that controls thyroid gland activity. It’s typically used as a marker of thyroid health. It is produced by the brain’s pituitary gland, but stimulates production of the hormones triiodothyronine (T3) and thyroxine (T4) in the thyroid gland.

  1. High TSH levels typically indicate an underactive thyroid gland, which produces too little thyroid hormone. This is known medically as hypothyroidism.
  2. Low TSH levels typically indicate an overactive thyroid gland, which produces too much thyroid hormone. This is known medically as hyperthyroidism.
 
 
 

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