

The T4 test measures thyroxine, a hormone that plays a vital role in regulating metabolism, energy, and growth. It helps diagnose thyroid conditions like hypothyroidism or hyperthyroidism, especially when symptoms such as fatigue, weight changes, or neck swelling are present.
Often used with TSH and T3, this test is also helpful for monitoring thyroid treatment or screening those with a history of thyroid issues.
Other Names: Total triiodothyronine, TT4
No fasting required.
Do not take Biotin (Vitamin B7) for 8 hours prior to extraction.
For patients taking medicines to lower cholesterol (D-T4), medication should be discontinued for 4-6 weeks prior to collection (please consult your doctor before following this preparation).
Service will be provided at your given address. Home service is available within Metro Manila areas only. Home service fee is ₱800.
Home service appointments require a confirmed date and time to ensure availability and timely service.
A Hati Health concierge will contact you via email within 1–2 business days to confirm your schedule and send your confirmation email.
On the day of your appointment, please ensure you are available at the provided address and have at least one valid ID ready.
To claim your service, present your confirmation email and valid ID to the attending healthcare provider.
Note: Price is exclusive of the home service fee. The total amount will be calculated at checkout.
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