Results are usually available within 24 hours after the blood sample has been analysed by the laboratory.

This test measures Free Thyroxine (FT4), one of the main hormones produced by the thyroid gland, which plays a key role in regulating metabolism and energy levels.

No. This is a screening test only. It can provide useful information about thyroid hormone levels, but all results must be interpreted by a registered healthcare professional or physician.

Abnormal FT4 levels may be associated with symptoms such as fatigue, weight changes, mood changes, or changes in heart rate. These symptoms are non-specific and require clinical evaluation.

No fasting is usually required for this test. You can eat and drink normally unless advised otherwise by a healthcare professional.

Yes. Thyroid medication and certain other medicines may influence FT4 levels. Always inform your clinician about any medication you are taking before testing.

This test may be suitable for individuals experiencing symptoms of thyroid imbalance, those already diagnosed with thyroid conditions, or anyone monitoring thyroid health over time.

Yes. Acute illness, stress, and changes in overall health can sometimes affect thyroid hormone levels.

FT4 alone provides useful information, but thyroid health is usually best assessed alongside other markers such as TSH and FT3 for a full clinical picture.

If your results are outside the expected range, further investigation or repeat testing may be recommended by a healthcare professional.

All results should be reviewed and interpreted by a qualified healthcare professional or physician, who can assess them in the context of your symptoms and medical history.