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Thyroid Free T4

£49

SKU: FT4. Category: .

Product Description

Thyroid Free T4

Free T4 measures the free, unbound thyroxine levels in the bloodstream. This thyroid function blood test measures the amount of thyroxine, or T4, in your blood. T4 is one of two major hormones produced by the thyroid gland.

The body has a feedback system that turns thyroid hormone production on and off. When the level of T4 in the bloodstream decreases, the hypothalamus (an organ in the brain) releases thyrotropin releasing hormone, which stimulates the pituitary gland (an organ below the hypothalamus) to release thyroid-stimulating hormone (TSH), which in turn stimulates the thyroid gland to make and/or release more T4. As blood concentrations of T4 increase, TSH release is inhibited.

If the thyroid gland does not produce sufficient T4, due to thyroid dysfunction or to insufficient TSH, then the affected patient experiences symptoms of hypothyroidism such as weight gain, dry skin, cold intolerance, irregular menstruation, and fatigue. If the thyroid gland produces too much T4, the rate of the patient’s body functions will increase and cause symptoms associated with hyperthyroidism such as increased heart rate, anxiety, weight loss, difficulty sleeping, tremors in the hands, and puffiness around dry, irritated eyes.

We recommend a thyroid test for anyone who:

  • has a family member with thyroid disease
  • has been diagnosed with chronic fatigue syndrome
  • is a woman in or near menopause
  • has recently given birth
  • has other pituitary or endocrine disease
  • is experiencing symptoms of thyroid disease

Need help? Click here to email info@trustedlabs.co.uk or call 0333 433 0986

Trusted Labs services are for informational purposes only. It is not the intention of Trusted Labs Ltd to provide specific medical advice but rather to provide users with information to better understand their health. Specific medical advice including diagnosis and treatment will not be provided. Always seek the advice of a trained health professional for medical advice, diagnosis or treatment.

Both the physician and the testing laboratory are independent contractors with whom Trusted Labs Ltd makes arrangements for your blood tests. No external testing laboratory or Trusted Labs Ltd will be liable for any acts or omissions of the physician, the testing laboratory, or their agents or employees.

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