The thyroid gland controls our entire metabolism through its hormones. An underactive thyroid (hypothyroidism) – often caused by the autoimmune disease Hashimoto's thyroiditis – develops gradually and often goes unnoticed for a long time.
Functions of the Thyroid Gland
The thyroid hormones T3 and T4 regulate energy metabolism, body temperature, heartbeat, and mood. Their production is controlled by the hormone TSH from the pituitary gland. We explain the basics on the page Our Thyroid.
Symptoms of an Underactive Thyroid
- Fatigue and lack of drive
- Sensitivity to cold
- Weight gain despite the same diet
- Dry skin, hair loss
- Concentration and mood slumps
Correctly interpreting TSH, T3, T4, and antibodies
The TSH value provides an initial orientation: If it is elevated, the thyroid often works too slowly.For a more precise assessment, the free hormones fT3 and fT4 are used. If Hashimoto's is suspected, antibodies (TPO-AK) are also determined. You can find scientifically based guidelines through the AWMF.
Treatment
An underactive thyroid can usually be well treated with thyroid hormones. Regular check-ups are important to adjust the dosage. The therapy should be managed by a doctor.
Test thyroid levels
With the Thyroid Profile from Probatix , you can conveniently determine the key values from home. You can find more hormone-related tests in the category Hormones.
Frequently Asked Questions
What TSH level indicates an underactive thyroid?
A persistently elevated TSH level (above the reference range) is an indication; the evaluation is done medically together with fT3/fT4.
What is Hashimoto's?
An autoimmune disease in which the immune system attacks the thyroid gland – the most common cause of hypothyroidism.
What are the symptoms of hypothyroidism?
Fatigue, feeling cold, weight gain, dry skin, and mood swings.
This article is for general information and does not replace medical advice.
