Ntchito yaikulu ya chithokomiro ndi kupanga ndi kutulutsa mahomoni a chithokomiro, kuphatikizapo thyroxine (T4) ndi triiodothyronine (T3) ， Free Thyroxine (FT4), Fre Triiodothyronine (FT3) ndi Thyroid Stimulating Hormone yomwe imagwira ntchito yaikulu m'thupi. ndi kugwiritsa ntchito mphamvu.

Mahomoni a chithokomiro amakhudza kakulidwe ka thupi la munthu, kakulidwe kake, kagayidwe kake, ndi thanzi lake lonse mwa kuwongolera njira za thupi monga kuchuluka kwa kagayidwe kachakudya, kutentha kwa thupi, kugunda kwa mtima, kugaya chakudya, dongosolo lamanjenje ndi minofu, kupanga maselo ofiira a magazi, ndi kagayidwe ka mafupa.

Kuchuluka kwa chithokomiro kapena kusagwira bwino ntchito kwa chithokomiro kumatha kupangitsa kuti thupi lisamayankhe bwino pa mahomoniwa. Hyperthyroidism ingayambitse kufulumizitsa kagayidwe kake, kuwonjezereka kwa kugunda kwa mtima, kuwonjezeka kwa kutentha kwa thupi, ndi kufulumira kwa mafuta, pamene hypothyroidism ingayambitse kuchepa kwa kagayidwe kake, kuchepetsa kugunda kwa mtima, kuchepa kwa kutentha kwa thupi, ndi kuchepa kwa kutentha kwa thupi.

Apa Ife tiri nazoMtengo wa TT3t,Chithunzi cha TT4, Mayeso a FT4, Mayeso a FT3,TSH test kitkuti azindikire ntchito ya Chithokomiro