Isi ọrụ nke thyroid gland bụ synthesize na hapụ thyroid hormones, gụnyere thyroxine (T4) na triiodothyronine (T3), Free Thyroxine (FT4), Free Triiodothyronine (FT3) na Thyroid Stimulating Hormone nke na-arụ a isi ọrụ na-arụ ọrụ metabolism na ume itinye n'ọrụ.

Hormone thyroid na-emetụta mmepe anụ ahụ mmadụ, uto, metabolism, na ahụike zuru oke site n'ịchịkwa usoro anụ ahụ dị ka ọnụọgụ mmeghachi omume intracellular metabolic, okpomọkụ ahụ, ọnụọgụ obi, ikike mgbari nri, sistem ụjọ na akwara, mmepụta mkpụrụ ndụ ọbara uhie, na metabolism ọkpụkpụ.

Ọkpụkpụ thyroid na-emebiga ihe ókè ma ọ bụ nke na-adịghị arụ ọrụ nwere ike ime ka mmeghachi omume anụ ahụ na homonụ ndị a ghara itule. Hyperthyroidism nwere ike ime ka metabolism na-agbawanye ngwa ngwa, ọnụ ọgụgụ ụbụrụ na-amụba, ịba ụba nke ahụ ọkụ, na ịṅụ ọkụ ọkụ ọkụ, ebe hypothyroidism nwere ike ime ka metabolism dị nwayọọ, ibelata ọnụego pulse, ibelata okpomọkụ ahụ, na mbelata mmepụta okpomọkụ.

Ebe a anyị nwereTT3 ihet,Nnwale TT4, FT4 Ule, FT3 Ule ,Ngwa ule TSHmaka ịchọpụta ọrụ nke thyroid