Hypothyroidism is a condition in which the thyroid gland produces insufficient amount of hormone thyroxine.

Iodine deficiency is the main cause of hypothyroidism. However, it can also be caused due to inflammation of the thyroid gland, pituitary or hypothalamic disease or certain medications.

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Since the main purpose of thyroid hormone is to maintain the body's metabolism, people with hypothyroidism will have symptoms associated with a slow metabolism. The symptoms of are subtle and non-specific.

Blood tests measuring the T3, T4 and TSH levels can help confirm the diagnosis of hypothyroidism.

Hypothyroidism can be easily and completely treated with thyroid hormone replacement.

Overproduction of thyroid hormone leads to hyperthyroidism.

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