Cov khoom siv yog siv rau hauv vitro kom muaj nuj nqis nrhiav kom pom qhov concentration ntawm tag nrho thyroxine (TT4) hauv tib neeg cov ntshav, ntshav lossis ntshav kuaj tag nrho.
Cov khoom siv yog siv los ntsuas qhov ntau ntawm tag nrho triiodothyronine (TT3) hauv tib neeg cov ntshav, ntshav lossis ntshav kuaj tag nrho hauv vitro.
Cov khoom siv no yog siv los kuaj kom muaj nuj nqis ntawm qhov concentration ntawm thyroid-stimulating hormone (TSH) hauv tib neeg cov ntshav, ntshav ntshav lossis ntshav kuaj tag nrho hauv vitro.