What does diagnosis mean?
The immune system produces antibodies to thyroid peroxidase (TPO) and thyroglobulin. Gradually, the gland tissue is replaced by lymphocytic infiltration and fibrosis, and its ability to produce hormones decreases - but this happens slowly, over years, and not for everyone.
- Euthyroid phase: antibodies are present, TSH is normal - health is normal, no treatment is required
- Subclinical hypothyroidism: TSH is elevated, T4 is normal - the decision on treatment is made individually
- Manifest hypothyroidism: TSH is increased, T4 is decreased - replacement therapy is indicated
- Hashitoxicosis: at the onset of the disease, a temporary release of hormones with signs of thyrotoxicosis is possible
What to do with antibodies
This is the main issue that causes patients to waste energy and money. The antibody level does not reflect the severity of the condition, does not require monitoring over time, and is not a target for treatment.
- There is no need to test antibodies to TPO again - a single determination at diagnosis is sufficient
- Their level does not correlate with either health or gland function
- There are no drugs proven to reduce antibodies and change the outcome
- Selenium has been studied and may slightly reduce the titer, but does not affect gland function or prognosis
- Only TSH matters
When to start treatment
- For manifest hypothyroidism, levothyroxine is mandatory
- For subclinical hypothyroidism - in combination: TSH level, presence of symptoms, age, cardiovascular risks
- In women planning pregnancy or who are pregnant, the threshold for starting therapy is much lower - hormones are critical for fetal development
- In the elderly, target TSH values are higher, and therapy is initiated more cautiously
It is not thyroiditis itself that is treated, but its consequence—a lack of hormones. Therefore, the drug is selected according to TSH and taken daily on an empty stomach; control after dose selection - after 6–8 weeks.
Associated conditions and lifestyle
- Autoimmune thyroiditis is often combined with vitiligo, alopecia areata, celiac disease, type 1 diabetes, B12-deficiency anemia
- For unexplained weakness, it is worth checking ferritin and vitamin B12
- There is no special “diet for AIT” with proven effectiveness; a gluten-free diet is indicated only for confirmed celiac disease
- Excessive intake of iodine and dietary supplements with it can worsen the course - take only as directed
- Ultrasound of the thyroid gland is repeated no more often than necessary: the structure changes during AIT, but the picture itself does not affect treatment