What's the difference between and under-active and an overactive thyroid?

The difference between an under-active thyroid and an overactive thyroid is that an under-active thyroid means that your thyroid is not producing enough thyroid hormone. And an overactive thyroid means that your thyroid is producing too much thyroid hormone. And these both have very different effects in the body.

Alice Godfrey

Nutritionist and Thyroid expert

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