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Related Concept Videos

Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...
Hyperthyroidism I: Introduction01:25

Hyperthyroidism I: Introduction

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...
Obesity01:24

Obesity

The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in adipocytes...
Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

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...
Functions of Thyroid Hormones01:18

Functions of Thyroid Hormones

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.
TH is indispensable for the normal development and maturation of the skeletal, muscular, and nervous systems during fetal and childhood growth. It facilitates bone mineral turnover and regulates protein synthesis in developing tissues, contributing significantly to overall growth and...
Graves' Disease I: Introduction01:28

Graves' Disease I: Introduction

Graves' disease is an autoimmune disorder that causes hyperthyroidism, or overactivity of the thyroid gland. It results from autoantibodies called thyroid-stimulating immunoglobulins (TSIs), which bind to thyroid-stimulating hormone (TSH) receptors, leading to overstimulation of hormone production and a hypermetabolic state.EtiologyAlthough considered idiopathic, Graves’ disease has well-established contributing factors. There is a strong genetic component, with increased prevalence in...

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Related Experiment Video

Updated: Jun 22, 2026

An Acupoint Catgut-embedding Therapy for Treating Obesity
04:50

An Acupoint Catgut-embedding Therapy for Treating Obesity

Published on: April 4, 2025

Obesity and thyroid function.

Thomas Reinehr1

  • 1Department of Paediatric Nutrition Medicine, Vestische Hospital for Children and Adolescents, University of Witten/Herdecke, Datteln, Germany. T.Reinehr@kinderklinik-datteln.de

Molecular and Cellular Endocrinology
|June 23, 2009
PubMed
Summary
This summary is machine-generated.

Thyroid hormone alterations in obesity, including elevated thyrotropin (TSH) and triiodothyronine (T3), appear adaptive. Weight loss normalizes these levels, but reduced resting energy expenditure (REE) may hinder weight maintenance.

Related Experiment Videos

Last Updated: Jun 22, 2026

An Acupoint Catgut-embedding Therapy for Treating Obesity
04:50

An Acupoint Catgut-embedding Therapy for Treating Obesity

Published on: April 4, 2025

Area of Science:

  • Endocrinology
  • Metabolism
  • Obesity Research

Background:

  • Obese individuals often exhibit elevated thyrotropin (TSH) and triiodothyronine (T3) levels.
  • These thyroid hormone changes are linked to increased resting energy expenditure (REE).

Purpose of the Study:

  • To investigate the relationship between thyroid hormone levels and obesity.
  • To explore the role of thyroid hormones in energy expenditure and weight management.

Main Methods:

  • Analysis of thyroid hormone concentrations (TSH, T3) in obese and non-obese individuals.
  • Assessment of resting energy expenditure (REE) in relation to thyroid hormone levels.
  • Observation of changes in thyroid hormones and REE following weight loss.
  • Consideration of leptin's influence on TSH release.

Main Results:

  • Elevated TSH and T3 concentrations are common in obesity.
  • Weight loss leads to normalization of thyroid hormone levels.
  • Increased thyroid hormones correlate with higher REE, potentially reducing fat accumulation.
  • Rapid weight loss decreases TSH and T3, lowering REE and possibly impeding weight maintenance.

Conclusions:

  • Thyroid hormone alterations in obesity represent an adaptive response.
  • The decrease in REE post-weight loss may contribute to challenges in maintaining weight loss.
  • Leptin signaling is a potential mediator linking obesity and thyroid hormone dysregulation.