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Disorders of iodine balance: consequences of deficiency and excess. The role of iodine in the prenatal period and in childhood development

Wojciech Wiśniewski

Wojciech Wiśniewski

2026-05-19
3 min. read
Disorders of iodine balance: consequences of deficiency and excess. The role of iodine in the prenatal period and in childhood development
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Iodine, an essential trace element for thyroid hormone synthesis, occurs naturally in seafood, cruciferous vegetables, and marine aerosols, from which it is absorbed via the respiratory tract and skin. Due to widespread deficiency risks, it is also routinely supplemented in table salt. What are the clinical and metabolic consequences associated with its chronic insufficiency or excessive intake? How do these imbalances affect pregnancy outcomes, fetal development, and children’s health across different age groups, considering their physiological requirements and developmental vulnerabilities?

Niedobór jodu

Niedobór jodu powoduje zaburzenia, które zależnie od jego stopnia mogą mieć różne nasilenie.. Wiąże się z występowaniem zaburzeń tarczycy u dorosłych, a także występowaniem woli prostych.. Sytuacja ta wywołuje niedoczynność wpływającą na osłabienie funkcji metabolicznych oraz rozrodczych.. U dzieci ma miejsce kretynizm, a więc choroba dzieci, których matki, szczególnie w pierwszych tygodniach ciąży, cierpią na niedoczynność tarczycy i jednocześnie niedobór tegoż pierwiastka.. Schorzenie to charakteryzuje się niedorozwojem umysłowym dziecka.. Bardzo często obserwowany jest w okolicach górskich i podgórskich.

Nadmiar jodu

Sytuacja taka ma bardzo rzadko miejsce, właściwie jest niespotykana.. Zwykle pojawia się jedynie zahamowanie syntezy hormonów tarczycy czy odczyny alergiczne, jednak zwykle związane są one z chorobami czy stosowaniem leków.. Nadmiar jodu w organizmie wywołuje nadczynność tarczycy oraz pojawienie się woli.. Niestety w związku ze wzmożoną czynnością gruczołów śluzowych mogą być odczuwane nudności.. Niekiedy współistnieją wymioty, biegunka, a także kataralne objawy w nosie i oskrzelach.

Jod w ciąży

Odpowiednie stężenie jodu w ciąży jest niezwykle istotne, szczególnie w pierwszych tygodniach ciąży.. Niedobór tegoż pierwiastka i wiążąca się z tym niedoczynność tarczycy prowadzi do zmniejszonej produkcji hormonów przez ten gruczoł.. W efekcie płód, który jeszcze nie ma wykształconej tarczycy, cierpi z powodu braku hormonów T3 oraz T4 od matki, niezbędnych do kształtowania ośrodkowego układu nerwowego.. W związku z tym dziecko narażone jest na wystąpienie nieodwracalnych wad umysłowych.. W początkowych tygodniach ciąży może dojść do rozwinięcia choroby zwanej kretynizmem, która charakteryzuje się niedorozwojem umysłowym.. Dziecko takie cechuje się dużą głową i wraz z upływem czasu pojawiającym się tępym wyrazem twarzy i niskim wzrostem.. Dodatkowo towarzyszy temu powolność ruchów, senność, a nawet bełkotliwa mowa.. Właśnie z tego powodu odpowiednie stężenie jodu jest tak niezbędne dla prawidłowego rozwoju płodu w organizmie matki.. Warto wspomnieć, że zaburzenia w stężeniu tegoż mikroelementu zwiększają znacząco ryzyko poronienia, a także śmiertelności dzieci.

Jod dla dzieci

Jod jest niezwykle potrzebnym pierwiastkiem warunkującym prawidłowy rozwój dzieci.. Pierwiastek ten odpowiada między innymi za regulację przemian energetycznych.. Dodatkowo konieczny jest on do prawidłowego wzrostu oraz osiągnięcia dojrzałości płciowej.. Odnotowano, że niedobór tegoż mikroelementu może powodować upośledzenie zarówno psychiczne, jak i fizyczne.. Podsumowując jod jest pierwiastkiem, którego zarówno nadmiar, jak i niedobór powoduje niekiedy nieodwracalne i opłakane skutki.. Jest to niezwykle istotne również ze względu na statystyki, które mówią, że w Polsce ok.. 10 mln ludzi mieszka na terenach, w których nie ma dostatecznej ilości tegoż pierwiastka.. Niebezpieczeństwo szczególnie dla kobiet w ciąży i ich dzieci dodatkowo potęguje tragiczne skutki opisywanych schorzeń.. Właśnie dlatego niezwykle istotne jest stosowanie zrównoważonej diety dostarczające niezbędnych ilości wszelkich składników odżywczych.. Pozwala to na zachowanie zdrowego i długiego życia.
Wojciech Wiśniewski

Wojciech Wiśniewski

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