Type
Blood Testing
Duration
10 min
Sample
Blood (venous)
What's included
3 deliverables in this treatment
- Venous blood draw
- Free thyroxine (FT4) measurement
- Laboratory analysis and result report
Free thyroxine (FT4) is one of the main hormones produced by the thyroid gland, and measuring the unbound, active fraction helps assess how the thyroid is functioning. It is a standard part of thyroid testing, often alongside TSH and FT3, when investigating tiredness, weight change or other thyroid-related symptoms. At Centrum Medyczne Medix it is run in the on-site laboratory at a fixed published price.
About this treatment
Free thyroxine (FT4) is the active, unbound form of thyroxine, the principal hormone secreted by the thyroid gland to help regulate metabolism. Measuring the free fraction — rather than the total, much of which is bound to proteins — gives a clearer indication of how much hormone is actually available to the body's tissues, which is why FT4 is a core component of thyroid assessment.
FT4 is usually interpreted together with other thyroid markers, particularly TSH (the pituitary signal that drives the thyroid) and sometimes FT3, to build a picture of whether the gland is underactive, overactive or working normally. Patterns in these results are associated with conditions a doctor will interpret in context, and the panel is commonly requested when symptoms such as fatigue, unexplained weight change, temperature sensitivity, mood changes…
Good to know
- Assesses
- Thyroid function
- Often paired with
- TSH and FT3
- Sample
- Venous blood
Who is this for?
People investigating or monitoring thyroid function
About the clinic
Reviews, team and credentials
Independent review links and clinic-reported team information.
380 clinic reviews
From independent platforms
Clinical team
More than thirty medical specialties hold consulting clinics at Centrum Medyczne Medix, including allergology, cardiology, cardiac surgery, dermatology, diabetology, endocrinology, gastroenterology, general and orthopaedic surgery, laryngology, nephrology, neurology, ophthalmology, paediatrics, proctology, psychology, pulmonology, radiology, rheumatology and urology, supported by an on-site analytical laboratory and…
Languages: Polish
Treatment highlights
- Venous blood draw
- Free thyroxine (FT4) measurement
+1 more item in What's included
32 zł for a free thyroxine (FT4) measurement from a venous sample. Related thyroid markers (FT3, anty-TPO) are also listed in the laboratory price list.