What Does High FT4 and Low TSH Mean?
Last Updated Mar 24, 2020 7:40:21 PM ET
A person who has high FT4 test results and low TSH results has hyperthyroidism, according to the American Thyroid Association. FT4 looks for thyroxine, the primary thyroid hormone. A TSH test measures the amount of thyroid stimulating hormone that the pituitary gland releases into the blood.
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