Thyroid hormones :
in case of hypothyroidism.
Thyroid hormones are essential. But the thyroid gland itself is not, so it can be replaced by taking orally the hormones it normally secretes. The right dosage is easy to assess, through a simple blood test, or according to how you respond to it. The perfect balance can always be found.
Synthetic antithyroid drugs :
in case of hyperthyroidism.