205 EGP
- Test code
- FT3
- Sample type
- Blood sample
- Fasting
- No fasting needed
- Result time
- Within 6 hours
- Home sampling
- Available
- Reference range
- 2.3 – 4.2 pg/mL
T3 is formed from T4 in the tissues and has the strongest effect on energy use and heart rate.
Doctors order it mainly when an overactive thyroid is suspected, because it can rise before T4 does.
Preparation before the test
- No fasting needed; it can be done any time.
- Stop biotin (B7) supplements 48 hours before; it affects the result.
This information is for awareness only and is not a substitute for medical advice — your treating doctor interprets the result for your case.
