Checks if your immune system is attacking the thyroid gland. Often seen in Hashimoto’s thyroiditis, an underactive thyroid condition.

Detects antibodies that attack the thyroid enzyme needed to make hormones. Found in Hashimoto’s and Graves’ disease.

A hormone made by the brain to tell the thyroid to produce more hormones. High or low levels can mean an underactive or overactive thyroid.

The main hormone produced by the thyroid gland. It plays a key role in regulating metabolism, energy balance, and overall hormonal function.

The main hormone made by the thyroid. It helps control metabolism, energy use, and body temperature.

The active form of thyroid hormone. It has a strong effect on energy levels, mood, heart rate, and metabolism.

High levels can reduce testosterone and affect sex drive or fertility.

Affects menstrual cycles and milk production. High levels may cause irregular periods or infertility.