Once the amount of T4 reaches appropriate levels, your pituitary gland recognizes that and stops producing TSH. In people with subclinical hyperthyroidism, the thyroid produces normal levels of T4 ...
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Verywell Health on MSNWhat Is T4? Thyroxine Test and What It MeansEun Lee, MD If your healthcare provider has ordered a T4 test, you may wonder what it is. Thyroxine is another name for T4, ...
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