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Glossary

What is Hypothyroidism?

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Hypothyroidism

Hypothyroidism, or underactive thyroid, is a condition in which the thyroid gland does not make enough thyroid hormone, which can slow many body functions.

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In plain words

Thyroid hormone helps set how fast the body uses energy.

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Why it matters

Checking thyroid function rules out a treatable cause of weight gain before or during weight-loss treatment.

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Hypothyroidism, or underactive thyroid, is a condition in which the thyroid gland does not make enough thyroid hormone, which can slow many body functions.

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