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Thyroid supplements are a popular option for losing weight since the main role of the thyroid is to regulate your metabolism. Having an underactive thyroid is also linked to weight gain.

Endocrinologists say there is no clinical evidence of thyroid supplements boosting metabolism. People with a healthy thyroid taking these supplements run the risk of developing hyperthyroidism, which can lead to irregular heartbeats, hand tremors, sweating, anxiety, and muscle weakness.

Thyroid supplements are high in iodine, and combined with daily dietary intake, may lead to iodine toxicity and thyroid dysfunction.

Several supplements sold as "thyroid health" or "thyroid support" products promise to assist you in shedding some extra pounds. But do they actually work?

First you need to answer a different question: is your weight gain related to a thyroid condition? The thyroid is a butterfly-shaped gland located in the front of your neck.…