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Almaty, Aksai-5 microdistrict, 12a

Almaty, GC Darkhan-2 territory, 29 Almaty, Abay Avenue, 61 Almaty, Zharokov St., 154
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Free thyroxine (Free T4) (Free Thyroxine, FT4, Serum)

The test determines the level of free thyroxine (T4) — the primary thyroid hormone. Free T4 reflects true thyroid hormonal activity and is independent of transport protein levels. Used to diagnose hypo- and hyperthyroidism and to monitor thyroid disease treatment. Recommended for fatigue, drowsiness, weight gain or loss, edema, thermoregulation disorders.

What the test evaluates:

  • Free thyroxine level in blood serum
  • Thyroid gland functional state

Biomaterial: Venous blood (serum)

  • Draw blood fasting
  • Exclude intense physical activity 24 hours before

Medications:

  • If possible, do not take thyroid hormones 24-48 hours before (consult physician)
  • Iodine preparations and biotin may affect results
  • Inform physician of all medications taken

Recommended for:

  • Suspected thyroid gland diseases
  • Hormonal disorder symptoms
  • Infertility and menstrual cycle disorders
  • Heart rhythm disorders

Elevated free T4: may indicate hyperthyroidism or thyrotoxicosis

Reduced free T4: may indicate hypothyroidism

Note: Combination with TSH and free T3 required; endocrinologist consultation mandatory.

Price 3 300 ₸
Test
Turnaround time 1–2 business days
Blood draw + 1 100 ₸
danger icon Test prices do not include the cost of biomaterial collection
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