Your thyroid is a small, butterfly-shaped gland located in the lower front part of your neck. It’s estimated that tens of millions of people worldwide have hypothyroidism or hyperthyroidism—approximately  5-25% of the world’s population.

Your thyroid is a small, butterfly-shaped gland located in the lower front part of your neck. It’s estimated that tens of millions of people worldwide have hypothyroidism or hyperthyroidism—approximately  5-25% of the world’s population.

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