What is Free Triiodothyronine (T3)?

Free Triiodothyronine (Free T3) is the active form of the thyroid hormone triiodothyronine (T3) that circulates unbound in the bloodstream.‍Unlike total T3, Free T3 is not bound to proteins, making it readily available to cells to regulate metabolism, energy production, and various physiological processes.

What does it assess?

Free Triiodothyronine (T3) is used to evaluate thyroid function, metabolic rate, and general hormonal health.‍It helps in diagnosing conditions like hyperthyroidism and hypothyroidism and assessing the balance between Free T3 and other thyroid hormones.‍Given its role in energy regulation, it is often checked when symptoms like fatigue, weight fluctuations, and abnormal body temperature regulation occur.

How do I optimize my Free Triiodothyronine (T3) levels?

Iodine and selenium are essential for thyroid hormone production. Sources of iodine include iodized salt and seaweed, while selenium is found in Brazil nuts, fish, and eggs. Chronic stress elevates cortisol, which can negatively impact thyroid hormone production and conversion.‍Techniques such as mindfulness, meditation, and regular exercise can help manage stress and maintain healthy thyroid function. A balanced diet rich in protein, whole grains, and healthy fats supports overall thyroid function. Avoid overly restrictive diets, which can lead to nutrient deficiencies and reduce T3 production.

What do high and low Free Triiodothyronine (T3) levels mean?

Elevated Free T3 levels are often associated with hyperthyroidism or excessive thyroid hormone supplementation.‍Symptoms of high Free T3 can include anxiety, rapid heart rate, weight loss, heat intolerance, and increased perspiration.‍Low Free T3 levels are usually linked with hypothyroidism, where the thyroid gland is underactive and does not produce enough hormones.‍Symptoms can include fatigue, weight gain, cold intolerance, dry skin, and slowed metabolism.