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Thyroid test empty stomach or not
What can affect thyroid test results...
Diagnosis - Underactive thyroid (hypothyroidism)
It's very important that an underactive thyroid (hypothyroidism) is diagnosed as soon as possible.
Low levels of thyroid-producing hormones, such as triiodothyronine (T3) and thyroxine (T4), can change the way the body processes fat.
This can cause high cholesterol and atherosclerosis (clogging of the arteries), which can potentially lead to serious heart-related problems, such as angina and a heart attack.
Therefore, you should see a GP and ask for a blood test if you repeatedly have symptoms of an underactive thyroid.
Thyroid function test
A blood test measuring your hormone levels is the only accurate way to find out whether there's a problem.
The test, called a thyroid function test, looks at levels of thyroid-stimulating hormone (TSH) and thyroxine (T4) in the blood.
Doctors may refer to this as "free" T4 (FT4).
A high level of TSH and a low level of T4 in the blood could mean you have an underactive thyroid.
If your test results show raised TSH but normal T4, you may be at risk of developing an underac
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