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Minerals are essential nutrients that the human body needs in small amounts to work properly. They play a vital role in many bodily functions, such as building strong bones and transmitting nerve impulses. Some minerals are needed for hormone production or to maintain a normal heartbeat. Major minerals include calcium, phosphorus, potassium, sulfur, sodium, chlorine, and magnesium, while trace minerals include iron, manganese, copper, iodine, zinc, cobalt, fluoride, and selenium.
 
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The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
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Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...
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Hyperthyroidism is a type of thyrotoxicosis characterized by the thyroid gland's overproduction of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). This hormone excess increases the basal metabolic rate and enhances sensitivity to catecholamines.DiagnosisDiagnosis is based on clinical features and biochemical testing. It typically shows suppressed thyroid-stimulating hormone (TSH) levels below 0.4 mIU/L, with elevated free T3 and/or T4. Additional tests, including thyroid...
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Goiter01:27

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Goiter refers to an abnormal enlargement of the thyroid gland that may appear as a diffuse goiter (uniform enlargement) or nodular (single or multiple nodules). Functionally, it is classified as nontoxic (normal/low hormone levels) or toxic (excess hormone production).PathophysiologyDiffuse thyroid enlargement typically results from prolonged stimulation by thyroid-stimulating hormone (TSH) or TSH-like agents, commonly seen in hypothyroidism or iodine deficiency. In contrast, in hyperthyroid...
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Thyroid function and serum copper, selenium, and zinc in general U.S. population.

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Biological Trace Element Research
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Serum selenium, zinc, and copper levels impact thyroid function. Zinc and copper show sex-specific associations with thyroid hormones like thyroxine (T4) and triiodothyronine (T3).

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Area of Science:

  • Endocrinology
  • Nutritional Science
  • Environmental Health

Background:

  • Thyroid hormones regulate metabolism, and their function can be influenced by essential trace elements.
  • Serum levels of selenium (Se), zinc (Zn), and copper (Cu) are crucial for various biological processes, including thyroid hormone metabolism.

Purpose of the Study:

  • To investigate the association between serum levels of selenium, zinc, and copper and thyroid function.
  • To explore potential sex-specific differences in these associations.

Main Methods:

  • Analysis of data from the National Health and Nutrition Examination Survey (2011-2012).
  • Assessment of thyroid function variables including TSH, FT3, TT3, FT4, TT4, and TGN.
  • Application of regression models with log-transformed thyroid hormone values as independent variables.

Main Results:

  • In males, zinc was linked to lower FT4/TT4, and copper to higher FT4/TT4. In females, copper correlated with higher TT3/TT4.
  • Smoking affected thyroid function differently in males (lower TSH, higher TGN) and females (lower TT4).
  • Males exhibited higher Se/Zn and lower Cu levels compared to females; smoking influenced Zn/Cu levels in males.

Conclusions:

  • Serum zinc and copper levels exhibit distinct associations with thyroid hormones, varying by sex.
  • These findings highlight the complex interplay between trace elements, sex, smoking, and thyroid function.