Thyroid health
Free Tri-iodothyronine (FT3)
Free Tri-iodothyronine (FT3) is a laboratory marker included in blood testing to contribute information about thyroid health. Results are interpreted alongside related biomarkers, your reference range and relevant clinical context rather than in isolation.
How this marker fits into a profile
Hormones and antibodies used together when assessing thyroid activity.
A single result does not provide a diagnosis. Reference ranges can vary by laboratory and may be influenced by factors such as age, sex, medicines, recent activity and the reason for testing.
Tests containing this marker
Compare profiles including Free Tri-iodothyronine (FT3).
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This information is educational and is not a diagnosis or a substitute for advice from your GP or another qualified healthcare professional.