Når thyrotropin alfa bindes til TSH receptorer på thyreoidea epithelialceller, stimuleres jodoptagelsen og organificeringen samt syntesen og afgivelsen af thyroglobulin, triiodothyronin (T3) og thyroxin (T4).
Binding of thyrotropin alfa to TSH receptors on thyroid epithelial cells stimulates iodine uptake and organification, and synthesis and release of thyroglobulin, triiodothyronine (T3) and thyroxine (T4).