In short
- FT3 (free T3) is a thyroid hormone that plays an important role in the body’s metabolism and energy balance.
- Together with TSH and FT4, FT3 provides insight into thyroid function.
- A high or low FT3 level may be associated with an overactive or underactive thyroid.
- Abnormal thyroid hormone levels can cause symptoms such as fatigue, palpitations, changes in weight or difficulty concentrating.
- A blood test can measure the amount of free T3 in the blood and help assess thyroid function.
- An FT3 test is usually assessed together with other thyroid hormone levels.
- Testing FT3 can be useful when you have unexplained symptoms or when a thyroid condition is suspected.
- Would you like more insight into your thyroid health? An FT3 test can provide valuable information.
What is the function of the thyroid gland?
The thyroid is a small organ in your neck that produces hormones. These hormones, including FT3 (free triiodothyronine), regulate your metabolism. This means they influence how quickly your body uses energy and how other organs function. The thyroid therefore helps regulate your energy levels, body temperature and even your heart rate.
What are the symptoms of an abnormal thyroid function?
If your thyroid is underactive (hypothyroidism), you may feel tired, gain weight, feel cold, develop dry skin or experience hair loss. If your thyroid is overactive (hyperthyroidism), you may lose weight, experience palpitations, sweat more, feel nervous or have difficulty sleeping. Symptoms can sometimes be vague, so if you have concerns, it is advisable to consult your doctor.
Where is the thyroid gland located in the body?
The thyroid is located at the front of your neck, just below your Adam’s apple. It is butterfly-shaped and lies directly in front of your windpipe. Normally, you cannot see or feel it unless it is significantly enlarged.
Are thyroid problems common?
Thyroid problems are relatively common, particularly among women. An estimated 1 in 10 people in the Netherlands experience thyroid problems at some point in their lives. Symptoms can develop at any age, but thyroid problems are more common in people over 40 and in women.
Can you develop thyroid problems later in life?
Yes, thyroid problems can develop later in life. The risk increases with age. Even if you have never experienced thyroid problems before, you can still develop an underactive or overactive thyroid later on.
What can affect thyroid function?
Several factors can affect how well your thyroid functions. These include genetics, certain conditions (such as autoimmune diseases), medications, pregnancy, stress and insufficient iodine in your diet. Sometimes the cause is not clear.
How can you support a healthy thyroid?
A healthy lifestyle can help support normal thyroid function. Make sure you get enough iodine through your diet, for example from iodised salt or bread. Eat a healthy and varied diet, exercise regularly and try to reduce stress. Do not smoke, as smoking can affect thyroid function.
Can thyroid problems be treated?
Yes, thyroid problems can usually be treated effectively. An underactive thyroid is often treated with medication that replaces thyroid hormones. An overactive thyroid can also be treated with medication, and in some cases other treatments such as surgery or radioactive iodine therapy may be used. Your doctor can discuss which treatment is most suitable for your situation.
This article is for informational purposes only and is not a substitute for medical advice from a doctor. If your symptoms persist or you are concerned, always contact your doctor.
